Loans (Allowance for Loan Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011		Dec. 31, 2011
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 38,551		$ 59,366		$ 39,360		$ 93,687
Charge-offs	(9,276)		(24,376)		(23,580)		(115,948)
Recoveries	1,552		1,950		4,202		5,438
Net charge-offs	(7,724)		(22,426)		(19,378)		(110,510)
Balance, end of period	30,859		44,121		30,859		44,121
Annualized net charge-offs during the period to average loans	2.46%		9.07%		2.06%		13.09%
Annualized net charge-offs during the period to ALL	100.12%		201.66%		83.73%		334.88%
Allowance for loan losses to loans held for investment	2.51%	[1]	4.95%	[1]	2.51%	[1]	4.95%	[1]	3.23%
Continuing operations [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Provision for losses	$ 32		$ 7,181		$ 10,877		$ 60,944

[1] Excludes discontinued operations.