Annual report pursuant to Section 13 and 15(d)

Real Estate and Intangible Assets - Additional Information (Detail)

v2.4.0.8
Real Estate and Intangible Assets - Additional Information (Detail) (USD $)
12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2013
Property
Dec. 31, 2012
Property
Dec. 31, 2011
Property
Jan. 14, 2013
Champaign, Illinois [Member]
Dec. 31, 2013
Champaign, Illinois [Member]
Apr. 10, 2013
Ohio [Member]
Dec. 31, 2013
Ohio [Member]
Apr. 11, 2013
Wisconsin [Member]
sqft
Dec. 31, 2013
Wisconsin [Member]
Dec. 31, 2013
Dayton, Ohio Office Building [Member]
Aug. 07, 2013
South Hadley Massachusetts [Member]
Dec. 31, 2013
South Hadley Massachusetts [Member]
Aug. 15, 2013
Lexington North Carolina [Member]
Dec. 31, 2013
Lexington North Carolina [Member]
Aug. 15, 2013
Crenshaw Pennsylvania [Member]
Dec. 31, 2013
Crenshaw Pennsylvania [Member]
Nov. 11, 2013
Canton North Carolina [Member]
sqft
Dec. 31, 2013
Canton North Carolina [Member]
Jul. 17, 2013
Hazelwood, Missouri [Member]
Option
Dec. 31, 2013
Hazelwood, Missouri [Member]
Dec. 31, 2013
2013 Real Estate Activity [Member]
Property
Dec. 31, 2012
2012 Real Estate Activity [Member]
Property
Operating Leased Assets [Line Items]                                            
Number of properties acquired 7 8 7                                   7 8
Number of properties expanded                                         1  
Option to extend lease term       11 years                                    
Period for lease expiration         2013-12                                  
Extended lease expiration month year       2024-12                                    
Amount of annualized straight line rents over the life of the lease       $ 1,400,000                                    
Leasing commission paid 1,041,000 1,738,000 6,000 400,000                 200,000   400,000       100,000      
Extended additional period of lease           10 years   8 years     1 year   12 years   12 years              
Lease expiration date, extended           2024-01   2028-10     2015-01   2026-04   2026-04              
Lease expiration period, month and year             2014-01   2020-10     2014-01   2014-04   2014-04   2024-07   2023-05    
Annualized straight line rent escalations           300,000   1,000,000     300,000   400,000   700,000       200,000      
Tenant allowance           500,000         3,400   50,000   80,000              
Expansion of our property, value               3,300,000                            
Expansion of our property, area               102,400                 150,000          
Rental income revised               600,000                            
Lease Expiration Date                   Jun. 30, 2015                        
Lease commencement date                                     Aug. 01, 2013      
Amount paid for tenant improvements                                     300,000      
Number of options to purchase property                                     2      
Date of option to purchase property one                                     2017-03      
Date of option to purchase property second                                     2023-05      
Remaining lease term after expansion                                 20 years          
Percentage used for calculation of lease rental                                 9.25%          
Annual increase in lease rental                                 2.00%          
Total annual property taxes for all properties not paid by tenants $ 10,800,000