Real Estate and Intangible Assets - Fair Value of Acquired Assets and Liabilities Assumed (Detail) - USD ($) $ in Thousands |
12 Months Ended |
Dec. 31, 2015 |
Dec. 31, 2014 |
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
$ 77,798
|
$ 134,461
|
Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
5,408
|
8,386
|
Above Market Leases [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
1,712
|
387
|
Below Market Leases [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
(1,246)
|
(1,236)
|
Premium on Assumed Debt [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
(249)
|
Richardson, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
24,700
|
|
Richardson, TX [Member] | Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
1,929
|
|
Richardson, TX [Member] | Above Market Leases [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
807
|
|
Birmingham, AL [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
3,648
|
|
Birmingham, AL [Member] | Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
360
|
|
Columbus, OH [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
7,700
|
11,800
|
Columbus, OH [Member] | Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
567
|
990
|
Columbus, OH [Member] | Above Market Leases [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
261
|
Columbus, OH [Member] | Below Market Leases [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
(1,079)
|
|
Salt Lake City, UT [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
22,200
|
|
Salt Lake City, UT [Member] | Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
1,678
|
|
Salt Lake City, UT [Member] | Above Market Leases [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
821
|
|
Salt Lake City, UT [Member] | Below Market Leases [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
(53)
|
|
Atlanta, GA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
13,000
|
|
Atlanta, GA [Member] | Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
723
|
|
Atlanta, GA [Member] | Above Market Leases [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
44
|
|
Atlanta, GA [Member] | Below Market Leases [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
(114)
|
|
Villa Rica GA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
6,550
|
|
Villa Rica GA [Member] | Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
151
|
|
Villa Rica GA [Member] | Above Market Leases [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
40
|
|
Allen, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
|
5,525
|
Allen, TX [Member] | Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
218
|
Allen, TX [Member] | Premium on Assumed Debt [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
(72)
|
Colleyville, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
|
4,523
|
Colleyville, TX [Member] | Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
181
|
Colleyville, TX [Member] | Below Market Leases [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
(6)
|
Colleyville, TX [Member] | Premium on Assumed Debt [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
(59)
|
Rancho Cordova, CA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
|
8,225
|
Rancho Cordova, CA [Member] | Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
278
|
Coppell, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
|
5,838
|
Coppell, TX [Member] | Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
230
|
Coppell, TX [Member] | Premium on Assumed Debt [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
(118)
|
Taylor, PA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
|
39,000
|
Taylor, PA [Member] | Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
2,870
|
Aurora, CO [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
|
8,300
|
Aurora, CO [Member] | Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
282
|
Indianapolis, Indiana Property [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
|
10,500
|
Indianapolis, Indiana Property [Member] | Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
732
|
Indianapolis, Indiana Property [Member] | Above Market Leases [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
126
|
Indianapolis, Indiana Property [Member] | Below Market Leases [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
(13)
|
Denver, CO [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
|
10,000
|
Denver, CO [Member] | Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
652
|
Denver, CO [Member] | Below Market Leases [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
(1,217)
|
Monroe, MI [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Total Purchase Price |
|
30,750
|
Monroe, MI [Member] | Customer Relationships [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
1,953
|
Land [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
10,528
|
14,566
|
Land [Member] | Richardson, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
2,728
|
|
Land [Member] | Birmingham, AL [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
650
|
|
Land [Member] | Columbus, OH [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
1,338
|
990
|
Land [Member] | Salt Lake City, UT [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
3,248
|
|
Land [Member] | Atlanta, GA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
2,271
|
|
Land [Member] | Villa Rica GA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
293
|
|
Land [Member] | Allen, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
874
|
Land [Member] | Colleyville, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
1,277
|
Land [Member] | Rancho Cordova, CA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
752
|
Land [Member] | Coppell, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
1,448
|
Land [Member] | Taylor, PA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
3,102
|
Land [Member] | Aurora, CO [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
2,882
|
Land [Member] | Indianapolis, Indiana Property [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
502
|
Land [Member] | Denver, CO [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
1,621
|
Land [Member] | Monroe, MI [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
1,118
|
Building [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
42,652
|
85,016
|
Building [Member] | Richardson, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
12,591
|
|
Building [Member] | Birmingham, AL [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
1,683
|
|
Building [Member] | Columbus, OH [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
3,511
|
6,080
|
Building [Member] | Salt Lake City, UT [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
11,861
|
|
Building [Member] | Atlanta, GA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
7,862
|
|
Building [Member] | Villa Rica GA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
5,144
|
|
Building [Member] | Allen, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
3,509
|
Building [Member] | Colleyville, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
2,307
|
Building [Member] | Rancho Cordova, CA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
5,898
|
Building [Member] | Coppell, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
3,221
|
Building [Member] | Taylor, PA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
24,449
|
Building [Member] | Aurora, CO [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
3,825
|
Building [Member] | Indianapolis, Indiana Property [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
5,334
|
Building [Member] | Denver, CO [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
6,503
|
Building [Member] | Monroe, MI [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
23,890
|
Tenant Improvements [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
6,996
|
6,231
|
Tenant Improvements [Member] | Richardson, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
2,781
|
|
Tenant Improvements [Member] | Birmingham, AL [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
351
|
|
Tenant Improvements [Member] | Columbus, OH [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
1,547
|
1,937
|
Tenant Improvements [Member] | Salt Lake City, UT [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
1,268
|
|
Tenant Improvements [Member] | Atlanta, GA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
916
|
|
Tenant Improvements [Member] | Villa Rica GA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
133
|
|
Tenant Improvements [Member] | Allen, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
125
|
Tenant Improvements [Member] | Colleyville, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
117
|
Tenant Improvements [Member] | Rancho Cordova, CA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
278
|
Tenant Improvements [Member] | Coppell, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
128
|
Tenant Improvements [Member] | Taylor, PA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
956
|
Tenant Improvements [Member] | Aurora, CO [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
92
|
Tenant Improvements [Member] | Indianapolis, Indiana Property [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
1,088
|
Tenant Improvements [Member] | Denver, CO [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
568
|
Tenant Improvements [Member] | Monroe, MI [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
942
|
In-Place Leases [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
7,410
|
14,239
|
In-Place Leases [Member] | Richardson, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
2,060
|
|
In-Place Leases [Member] | Birmingham, AL [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
458
|
|
In-Place Leases [Member] | Columbus, OH [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
1,144
|
823
|
In-Place Leases [Member] | Salt Lake City, UT [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
2,396
|
|
In-Place Leases [Member] | Atlanta, GA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
750
|
|
In-Place Leases [Member] | Villa Rica GA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
602
|
|
In-Place Leases [Member] | Allen, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
598
|
In-Place Leases [Member] | Colleyville, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
486
|
In-Place Leases [Member] | Rancho Cordova, CA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
473
|
In-Place Leases [Member] | Coppell, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
636
|
In-Place Leases [Member] | Taylor, PA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
6,171
|
In-Place Leases [Member] | Aurora, CO [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
413
|
In-Place Leases [Member] | Indianapolis, Indiana Property [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
1,990
|
In-Place Leases [Member] | Denver, CO [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
1,152
|
In-Place Leases [Member] | Monroe, MI [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
1,497
|
Leasing Costs [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
4,338
|
7,121
|
Leasing Costs [Member] | Richardson, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
1,804
|
|
Leasing Costs [Member] | Birmingham, AL [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
146
|
|
Leasing Costs [Member] | Columbus, OH [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
672
|
719
|
Leasing Costs [Member] | Salt Lake City, UT [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
981
|
|
Leasing Costs [Member] | Atlanta, GA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
548
|
|
Leasing Costs [Member] | Villa Rica GA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
$ 187
|
|
Leasing Costs [Member] | Allen, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
273
|
Leasing Costs [Member] | Colleyville, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
220
|
Leasing Costs [Member] | Rancho Cordova, CA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
546
|
Leasing Costs [Member] | Coppell, TX [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
293
|
Leasing Costs [Member] | Taylor, PA [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
1,452
|
Leasing Costs [Member] | Aurora, CO [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
806
|
Leasing Costs [Member] | Indianapolis, Indiana Property [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
741
|
Leasing Costs [Member] | Denver, CO [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
721
|
Leasing Costs [Member] | Monroe, MI [Member] |
|
|
Business Acquisition [Line Items] |
|
|
Fair value of acquired assets related to the properties acquired |
|
$ 1,350
|