Loans and Allowance for Loan Losses (Allowance for Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014	Dec. 31, 2014
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 19,008	$ 26,039	$ 20,345	[1]	$ 26,785
Recovery of loan losses	(788)	(1,685)	(1,926)		(2,369)
Charge-offs	(1,567)	(2,033)	(2,562)		(4,010)
Recoveries	1,336	1,654	2,132		3,569
Net charge-offs	(231)	(379)	(430)		(441)
Balance, end of period	$ 17,989	$ 23,975	$ 17,989		$ 23,975
Annualized net charge-offs during the period to average loans held for investment	0.07%	0.12%	0.06%		0.07%
Annualized net charge-offs during the period to ALL	5.15%	6.34%	4.82%		3.71%
Allowance for loan losses to loans held for investment	1.24%	1.89%	1.24%		1.89%	1.50%
Continuing operations [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Recovery of loan losses	$ (788)	$ (1,685)	$ (1,926)		$ (2,369)

[1] Derived from audited consolidated financial statements