Loans and Allowance for Loan Losses (Allowance for Loan Losses) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 29,314	$ 39,360	$ 93,687
Provision for loan losses	523	14,049	67,362
Charge-offs	(13,344)	(30,968)	(128,424)
Recoveries	10,292	6,873	6,735
Net charge-offs	(3,052)	(24,095)	(121,689)
Balance, end of period	$ 26,785	$ 29,314	$ 39,360
Annualized net charge-offs during the period to average loans	0.26%	1.94%	10.75%
Annualized net charge-offs during the period to ALL	11.39%	82.20%	309.17%
Allowance for loan losses to loans held for investment	2.21%	2.49%	3.23%