| Real Estate and Intangible Assets - Fair Value of Acquired Assets and Liabilities Assumed Related to Properties Acquired (Detail) (USD $) | 9 Months Ended | ||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep. 30, 2013
 2013 New Real Estate Activity [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 Land [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 Building [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 Drain System [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 Horticulture [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 Leasing Commissions [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 38th Avenue [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 38th Avenue [Member]
 Land [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 38th Avenue [Member]
 Building [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 38th Avenue [Member]
 Drain System [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 38th Avenue [Member]
 Horticulture [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 38th Avenue [Member]
 Leasing Commissions [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 Sequoia Street [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 Sequoia Street [Member]
 Land [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 Sequoia Street [Member]
 Building [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 Sequoia Street [Member]
 Drain System [Member] | Sep. 30, 2013
 2013 New Real Estate Activity [Member]
 Sequoia Street [Member]
 Leasing Commissions [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Cooler [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Lease In-Place [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Customer Relationships [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Below-Market Leases [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Land [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Drain System [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Leasing Commissions [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Colding Loop [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Colding Loop [Member]
 Lease In-Place [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Colding Loop [Member]
 Customer Relationships [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Colding Loop [Member]
 Below-Market Leases [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Colding Loop [Member]
 Land [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Colding Loop [Member]
 Drain System [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Colding Loop [Member]
 Leasing Commissions [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Trapnell Road [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Trapnell Road [Member]
 Cooler [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Trapnell Road [Member]
 Lease In-Place [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Trapnell Road [Member]
 Customer Relationships [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Trapnell Road [Member]
 Land [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Trapnell Road [Member]
 Drain System [Member] | Sep. 30, 2012
 2012 New Real Estate Activity [Member]
 Trapnell Road [Member]
 Leasing Commissions [Member] | |
| Business Acquisition Purchase Price Allocation [Line Items] | |||||||||||||||||||||||||||||||||||||||
| Total Purchase Price | $ 4,587,930 | $ 3,141,240 | $ 322,092 | $ 664,186 | $ 447,035 | $ 13,377 | $ 1,381,133 | $ 647,431 | $ 42,720 | $ 240,105 | $ 447,035 | $ 3,842 | $ 3,206,797 | $ 2,493,809 | $ 279,372 | $ 424,081 | $ 9,535 | $ 7,400,836 | $ 686,578 | $ 104,616 | $ 68,556 | $ (98,808) | $ 4,712,424 | $ 1,880,251 | $ 47,219 | $ 3,400,836 | $ 43,989 | $ 30,793 | $ (98,808) | $ 2,513,696 | $ 909,490 | $ 1,676 | $ 4,000,000 | $ 686,578 | $ 60,627 | $ 37,763 | $ 2,198,728 | $ 970,761 | $ 45,543 |