Reportable Segments - Summary of Assets by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified					3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2014 Operating Segments [Member]	Dec. 31, 2013 Operating Segments [Member]
Assets
Operating properties					$ 897,195	$ 845,698
Loan assets					95,279	147,702
REIT securities
Cash and cash equivalents	102,512	112,512	131,448	97,682	102,512	112,512
Restricted cash	16,329	13,372			3,048	186
Accounts receivable and prepaids					382	543
Deferred financing costs					2,543	2,645
Assets held for sale	25,156	23,038			25,156	23,038
TOTAL ASSETS	1,126,115	1,132,324			1,126,115	1,132,324
Capital Expenditures
Operating Properties					$ 1,408	$ 3,892