Schedule IV - Reconciliation of Mortgage Loans on Real Estate (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Mortgage Loans On Real Estate [Abstract]
Balance at January 1	$ 141,500	$ 869,269	$ 3,503,447
Additions during period:
Consolidation (deconsolidation) of subsidiary	150,332	(645,163)	(573,483)
Loan originations	2,325,433
Additional fundings	3,465	26	478
Amortization of deferred fees and discount, net	5,965	180	1,773
Unrealized gain on foreign currency translation	798
Unrealized gain on investments at fair value	7,417
Valuation allowance on loans held-for-sale	1,259		(1,456)
Recovery of provision for loan losses		36,147	21,973
Deductions during period:
Collections of principal	(494,301)	(118,959)	(2,069,799)
Loans sold	(21,162)		(5,750)
Deferred origination fees and expenses	(25,402)
Transfers to other assets	(6,813)		(7,914)
Balance at December 31	$ 2,087,888	$ 141,500	$ 869,269