Income Taxes (Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred income tax assets
Net operating loss carryforward	$ 590,938	$ 514,275
Provision losses on loans	179,916	268,406
Tax credit carryforward	44,563	44,170
Finance lease transactions	6,236	4,901
Net unrealized loss on cash flow hedges	774	243
Other	46,536	46,779
Total gross deferred income tax assets	868,963	878,774
Less valuation allowance	(18,658)	(821,429)
Total deferred income tax assets	850,305	57,345
Deferred income tax liabilities
Excess tax over financial statement depreciation	(13,945)	(16,371)
Net unrealized gain on investment securities available for sale	(19,051)	(29,390)
Other	(10,903)	(9,446)
Total gross deferred income tax liabilities	(43,899)	(55,207)
Net deferred income tax assets	$ 806,406	$ 2,138