Loans and Allowance for Loan Losses (Allowance for Loan Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period					$ 29,314	[1]	$ 39,360		$ 25,085		$ 38,551
Charge-offs	(1,724)		(9,276)		(10,836)		(23,580)
Recoveries	2,376		1,552		8,206		4,202
Net charge-offs	652		(7,724)		(2,630)		(19,378)
Balance, end of period	25,387		30,859		25,387		30,859		25,085		38,551
Annualized net charge-offs during the period to average loans	(0.22%)		2.46%		0.31%		2.06%
Annualized net charge-offs during the period to ALL	(10.19%)		100.12%		13.85%		83.73%
Allowance for loan losses to loans held for investment	2.12%	[2]	2.51%	[2]	2.12%	[2]	2.51%	[2]		2.49%
Continuing operations [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Provision for losses	$ (350)		$ 32		$ (1,297)		$ 10,877

[1] Derived from audited consolidated financial statements

[2] Excludes discontinued operations.