Stockholders' Equity (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
Balance, beginning	$ (40,584)
Unrealized gain on derivative financial instruments	8,367		5,453	(6,964)
Ineffective portion of cash flow hedges	2,481		5,038
Amortization of net unrealized gains on securities	(775)		(908)	(1,489)
Amortization of net deferred gains on settlement of swaps	(56)		(109)	(98)
Balance, ending			(40,584)
Mark-toMarket on Interest Rate Hedges
Balance, beginning	(27,423)
Unrealized gain on derivative financial instruments	8,367
Ineffective portion of cash flow hedges	2,481	[1]
Amortization of net unrealized gains on securities
Amortization of net deferred gains on settlement of swaps
Other-than-temporary impairments of securities		[2]
Deconsolidation of subsidiaries	16,575
Balance, ending
Deferred Gains on Settled Hedges
Balance, beginning	56
Unrealized gain on derivative financial instruments
Ineffective portion of cash flow hedges
Amortization of net unrealized gains on securities
Amortization of net deferred gains on settlement of swaps	(56)
Other-than-temporary impairments of securities		[2]
Deconsolidation of subsidiaries
Balance, ending
Other than Temporary Impairment
Balance, beginning	(16,578)
Unrealized gain on derivative financial instruments
Ineffective portion of cash flow hedges
Amortization of net unrealized gains on securities
Amortization of net deferred gains on settlement of swaps
Other-than-temporary impairments of securities	678	[2]
Deconsolidation of subsidiaries	15,900
Balance, ending
Unrealized Gains on Securities
Balance, beginning	3,361
Unrealized gain on derivative financial instruments
Ineffective portion of cash flow hedges
Amortization of net unrealized gains on securities	(775)
Amortization of net deferred gains on settlement of swaps
Other-than-temporary impairments of securities		[2]
Deconsolidation of subsidiaries	(2,586)
Balance, ending
Accumulated Other Comprehensive Loss
Balance, beginning	(40,584)
Unrealized gain on derivative financial instruments	8,367
Ineffective portion of cash flow hedges	2,481	[1]
Amortization of net unrealized gains on securities	(775)
Amortization of net deferred gains on settlement of swaps	(56)
Other-than-temporary impairments of securities	678	[2]
Deconsolidation of subsidiaries	29,889
Balance, ending

[1] As a result of the deconsolidation of CT Legacy Asset in the first quarter of 2012, the balance of accumlated other comprehensive income related to cash flow hedges of CT Legacy Asset was reclassified to interest expense.

[2] Represents the amortization of prior other-than-temporary impairments of securities in excess of credit losses.