Discontinued Operations and Real Estate Impairment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Real Estate Properties [Line Items]
Gains (Losses) on Sales of Investment Real Estate			$ 12,806	$ 2,671
Debt satisfaction charges, net	(11,726)	(2)	(22,722)	(1,651)
Total gross revenues	876	4,833	2,408	10,151
Pre-tax income (loss)	10,069	(3,015)	14,993	(3,872)
Discontinued Operation Asset Impairment Charges	1,391	3,129	8,735	5,690
Impairment of Real Estate			2,413
Sold Properties [Member]
Real Estate Properties [Line Items]
Aggregate Gross Disposition Price			48,466	74,815
Transferred Property [Member]
Real Estate Properties [Line Items]
Transfer of Real Estate			49,509	7,119
Debt satisfaction charges, net			$ 9,250	$ 1,728