Loans and Allowance for Loan Losses (Allowance for Loan Losses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 20,345	$ 26,785	$ 29,314
Provision for (Recovery of) loan losses	(2,981)	(5,371)	523
Charge-offs	(5,604)	(7,703)	(13,344)
Recoveries	3,435	6,634	10,292
Net charge-offs	(2,169)	(1,069)	(3,052)
Balance, end of period	$ 15,195	$ 20,345	$ 26,785
Annualized net charge-offs during the period to average loans held for investment	0.15%	0.08%	0.26%
Annualized net charge-offs during the period to ALL	14.27%	5.25%	11.39%
Allowance for loan losses to loans held for investment	0.98%	1.50%	2.21%