Schedule III (Consolidated) - Real Estate and Accumulated Depreciation - Reconciliation of Real Estate Owned (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]
Balance at beginning of the year	$ 418,197	$ 429,431	$ 799,506
Amounts capitalized	44,795	21,058	28,309
Impairments	(5,080)	(2,551)	(377,270)
Cost of real estate sold	(22,022)	(27,248)	(10,444)
Amounts retired or adjusted	374	(2,493)	(10,670)
Balance at the end of the year	$ 436,264	$ 418,197	$ 429,431