Contingent Liabilities - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015 Property
Commitments and Contingencies Disclosure [Abstract]
Maximum disposition fee on sale of partnership properties	3.00%
Number of partnership properties for sale	3
Percentage of disposition fees to be escrowed	50.00%
Amount of recovery of funds	$ 4,500,000
Recovery level	6,000,000
Payable fee on achieving recovery level	$ 16,296