Schedule III (Consolidated) - Real Estate and Accumulated Depreciation - Reconciliation of Accumulated Depreciation (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	$ 49,772	$ 44,489	$ 41,992
Depreciation expense	6,547	7,494	12,215
Amounts retired or adjusted	(2,823)	(2,211)	(9,718)
Balance at the end of the year	$ 53,496	$ 49,772	$ 44,489