Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Summary of Properties Acquired (Detail)

v3.3.0.814
Real Estate and Intangible Assets - Summary of Properties Acquired (Detail)
$ in Thousands
 9 Months Ended
Sep. 30, 2015
USD ($)
ft²
Option
Sep. 30, 2014
USD ($)
ft²
Option
Aug. 28, 2015
ft²
Business Acquisition [Line Items]      
Square Footage (unaudited) | ft² 429,427 1,406,054  
Total Purchase Price $ 71,248 $ 93,711  
Acquisition Expenses 514 1,114  
Annualized GAAP/Straight Line Rent 7,380 9,490  
Debt Issued & Assumed $ 39,579 $ 43,781  
Richardson, TX [Member]      
Business Acquisition [Line Items]      
Acquisition Date Mar. 06, 2015    
Square Footage (unaudited) | ft² 155,984    
Lease Term 9 years 6 months    
Renewal Options | Option 2    
Renewal Options Period 5 years    
Total Purchase Price $ 24,700    
Acquisition Expenses 108    
Annualized GAAP/Straight Line Rent 2,708    
Debt Issued & Assumed $ 14,573    
Birmingham, AL [Member]      
Business Acquisition [Line Items]      
Acquisition Date Mar. 20, 2015    
Square Footage (unaudited) | ft² 30,850    
Lease Term 8 years 6 months    
Renewal Options | Option 1    
Renewal Options Period 5 years    
Total Purchase Price $ 3,648    
Acquisition Expenses 76    
Annualized GAAP/Straight Line Rent $ 333    
Allen, TX [Member]      
Business Acquisition [Line Items]      
Acquisition Date   Mar. 27, 2014  
Square Footage (unaudited) | ft²   21,154  
Lease Term   12 years  
Renewal Options | Option   4  
Renewal Options Period   5 years  
Total Purchase Price   $ 5,525  
Acquisition Expenses   33  
Annualized GAAP/Straight Line Rent   570  
Debt Issued & Assumed   $ 3,481  
Colleyville, TX [Member]      
Business Acquisition [Line Items]      
Acquisition Date   Mar. 27, 2014  
Square Footage (unaudited) | ft²   20,355  
Lease Term   12 years  
Renewal Options | Option   4  
Renewal Options Period   5 years  
Total Purchase Price   $ 4,523  
Acquisition Expenses   33  
Annualized GAAP/Straight Line Rent   467  
Debt Issued & Assumed   $ 2,849  
Rancho Cordova, CA [Member]      
Business Acquisition [Line Items]      
Acquisition Date   Apr. 22, 2014  
Square Footage (unaudited) | ft²   61,358  
Lease Term   10 years  
Renewal Options | Option   1  
Renewal Options Period   5 years  
Total Purchase Price   $ 8,225  
Acquisition Expenses   73  
Annualized GAAP/Straight Line Rent   902  
Debt Issued & Assumed   $ 4,935  
Coppell, TX [Member]      
Business Acquisition [Line Items]      
Acquisition Date   May 08, 2014  
Square Footage (unaudited) | ft²   21,171  
Lease Term   12 years  
Renewal Options | Option   4  
Renewal Options Period   5 years  
Total Purchase Price   $ 5,838  
Acquisition Expenses   26  
Annualized GAAP/Straight Line Rent   601  
Debt Issued & Assumed   $ 3,816  
Columbus, OH [Member]      
Business Acquisition [Line Items]      
Acquisition Date May 28, 2015 May 13, 2014  
Square Footage (unaudited) | ft² 78,033 114,786  
Lease Term 15 years 9 years 6 months  
Renewal Options | Option 2    
Renewal Options Period 5 years    
Total Purchase Price $ 7,700 $ 11,800  
Acquisition Expenses 72 70  
Annualized GAAP/Straight Line Rent 637 $ 1,278  
Debt Issued & Assumed $ 4,466    
Taylor, PA [Member]      
Business Acquisition [Line Items]      
Acquisition Date   Jun. 09, 2014  
Square Footage (unaudited) | ft²   955,935  
Lease Term   10 years  
Renewal Options | Option   4  
Renewal Options Period   5 years  
Total Purchase Price   $ 39,000  
Acquisition Expenses   730  
Annualized GAAP/Straight Line Rent   3,400  
Debt Issued & Assumed   $ 22,600  
Salt Lake City, UT [Member]      
Business Acquisition [Line Items]      
Acquisition Date May 29, 2015    
Square Footage (unaudited) | ft² 86,409    
Lease Term 6 years 6 months    
Renewal Options | Option 1    
Renewal Options Period 5 years    
Total Purchase Price $ 22,200    
Acquisition Expenses 149    
Annualized GAAP/Straight Line Rent 2,411    
Debt Issued & Assumed $ 13,000    
Atlanta, GA [Member]      
Business Acquisition [Line Items]      
Acquisition Date Jul. 15, 2015    
Square Footage (unaudited) | ft² 78,151    
Renewal Options | Option 2    
Renewal Options Period 5 years    
Total Purchase Price $ 13,000    
Acquisition Expenses 109    
Annualized GAAP/Straight Line Rent 1,291    
Debt Issued & Assumed $ 7,540    
Aurora, CO [Member]      
Business Acquisition [Line Items]      
Acquisition Date   Jul. 01, 2014  
Square Footage (unaudited) | ft²   124,800  
Lease Term   15 years  
Renewal Options | Option   2  
Renewal Options Period   5 years  
Total Purchase Price   $ 8,300  
Acquisition Expenses   91  
Annualized GAAP/Straight Line Rent   $ 768  
Indianapolis, IN [Member]      
Business Acquisition [Line Items]      
Acquisition Date   Sep. 03, 2014  
Square Footage (unaudited) | ft²   86,495 4,512
Lease Term   11 years 6 months  
Renewal Options | Option   2  
Renewal Options Period   5 years  
Total Purchase Price   $ 10,500  
Acquisition Expenses   58  
Annualized GAAP/Straight Line Rent   1,504  
Debt Issued & Assumed   $ 6,100