Schedule IV - Reconciliation of Mortgage Loans on Real Estate (Parenthetical) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Mortgage Loans On Real Estate [Abstract]
Non-cash deferred interest on mortgage loans	$ 325,000	$ 26,000	$ 478,000