Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible asset, in-place lease value net	$ 6,761,390		$ 6,761,390		$ 6,359,438
Accumulated amortization expense	3,300,000		3,300,000		3,000,000
Amortization expense	$ 181,000	$ 163,000	$ 350,000	$ 331,000