Loans (Allowance for Loan Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012		Dec. 31, 2012
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 29,314	[1]	$ 39,360
Charge-offs	(3,010)		(4,015)
Recoveries	3,227		1,383
Net charge-offs	217		(2,632)
Balance, end of period	29,641		39,795
Annualized net charge-offs during the period to average loans	(0.07%)		0.87%
Annualized net charge-offs during the period to ALL	(2.93%)		26.60%
Allowance for loan losses to loans held for investment	2.66%	[2]	3.19%	[2]	2.49%
Continuing operations [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Provision for losses	$ 110		$ 3,067

[1] Derived from audited consolidated financial statements

[2] Excludes discontinued operations.