Non-Cash Investing and Financing Activities (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Supplemental Cash Flow Information [Abstract]
Transferred loans to OREO	$ 43,541	$ 26,644	$ 21,314
Transferred loans to mortgage servicing assets	4,563	2,864	4,222
Transfer of premises and equipment pending disposal to other assets, book value	1		1,513
Transfer of preferred stock pending redemption from equity to liability	50,000
Transfered accrued liabilities to common stock in conjunction with the vesting of liability-classified non-vested stock awards		216	59
Recorded receivable from sale of mortgage servicing rights			$ 1,204