Parent Company Condensed Financial Information - Condensed Statements of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net income (loss)	$ (8,674)	$ (14,395)	$ (12)
Adjustments to reconcile net loss to net cash provided by operating activities:
Other-than-temporary impairment of investments	50	116	482
Change in other assets	5,526	6,648	8,180
Change in other liabilities	3,134	(1,272)	(417)
NET CASH PROVIDED BY OPERATING ACTIVITIES	33,732	65,331	43,798
Cash flows from investing activities:
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	75,667	92,316	(95,745)
Cash flows from financing activities:
Issuance of preferred stock	40,592	0	0
Issuance of common stock	0	6,402	0
Dividends paid	(4,431)	(616)	(2,563)
Net cash provided by (used in) financing activities	(63,921)	(294,509)	189,391
Net increase (decrease) in cash	45,478	(136,862)	137,444
Beginning of year	92,918	229,780	92,336
End of year	138,396	92,918	229,780
Parent Company
Cash flows from operating activities:
Net income (loss)	(8,674)	(14,395)	(12)
Adjustments to reconcile net loss to net cash provided by operating activities:
Equity (loss) in undistributed earnings of subsidiaries	7,684	13,511	(1,364)
Other-than-temporary impairment of investments	50	116	482
Loss on sale of other investments	0	80	0
Change in other assets	(18)	315	53
Change in other liabilities	113	270	114
NET CASH PROVIDED BY OPERATING ACTIVITIES	(845)	(103)	(727)
Cash flows from investing activities:
Purchase of investments	0	(250)	0
Maturities, call and repayments of investments	99	55	19
Proceeds from sale of other investments	0	460	0
Additional investment in bank subsidiary	(37,000)	0	0
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(36,901)	265	19
Cash flows from financing activities:
Issuance of preferred stock	40,592	0	0
Issuance of common stock	0	6,402	0
Dividends paid	(4,431)	(616)	(2,563)
Net cash provided by (used in) financing activities	36,161	5,786	(2,563)
Net increase (decrease) in cash	(1,585)	5,948	(3,271)
Beginning of year	6,797	849	4,120
End of year	$ 5,212	$ 6,797	$ 849