Other Real Estate Owned (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
OREO activity
Balance, beginning of period	$ 79,303,000	$ 129,340,000
Additions	26,276,000	64,554,000
Sales	(59,053,000)	(87,358,000)
Valuation adjustments	(8,434,000)	(27,233,000)
Balance, end of period	38,092,000	79,303,000
OREO Valuation Allowances	17,400,000	33,600,000
Non-Covered OREO
OREO activity
Balance, beginning of period	21,027,000	30,790,000
Additions	3,283,000	14,177,000
Sales	(10,280,000)	(17,147,000)
Valuation adjustments	(1,419,000)	(6,793,000)
Balance, end of period	12,611,000	21,027,000
Covered OREO
OREO activity
Balance, beginning of period	58,276,000	98,550,000
Additions	22,993,000	50,377,000
Sales	(48,773,000)	(70,211,000)
Valuation adjustments	(7,015,000)	(20,440,000)
Balance, end of period	$ 25,481,000	$ 58,276,000
FDIC reimbursement (as a percent)	80.00%
Payable to FDIC (as a percent)	80.00%