Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Cash flows from operating activities:
Net income	$ 10,040	$ 6,185
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	789	655
Provision for loan losses	4,109	4,003
Deferred income taxes	(405)	(486)
Net amortization of debt securities	1,846	1,995
Amortization of intangible assets	433	490
Gain on sale of investment securities	(684)	(1,022)
Mortgage loans originated for sale	(19,389)	(25,541)
Proceeds from mortgage loans sold	25,905	26,033
Gain on sale of other real estate	(728)	(1,157)
Gain on state tax credits, net	(867)	(337)
Share-based compensation	778	243
Valuation adjustment on other real estate	544	1,036
Net accretion of loan discount and indemnification asset	(6,981)	(2,210)
Changes in:
Accrued interest receivable	(1,565)	(712)
Accrued interest payable	(91)	(176)
Prepaid FDIC insurance	524	666
Other assets	(6,479)	(6,764)
Other liabilities	(5,984)	11,954
Net cash provided by operating activities	1,795	14,855
Cash flows from investing activities:
Net increase in loans	43,922	5,932
Net cash proceeds received from FDIC loss share receivable	1,685	11,614
Proceeds from the sale of debt and equity securities, available for sale	122,894	64,476
Proceeds from the maturity of debt and equity securities, available for sale	29,484	33,160
Proceeds from the redemption of other investments	129	1,027
Proceeds from the sale of state tax credits held for sale	6,303	2,980
Proceeds from the sale of other real estate	3,983	19,219
Payments for the purchase/origination of:
Available for sale debt and equity securities	0	(10,192)
Other investments	(240)	(338)
State tax credits held for sale	0	(336)
Fixed assets	(501)	(3,145)
Net cash provided by investing activities	207,659	124,397
Cash flows from financing activities:
Net increase in noninterest-bearing deposit accounts	(81,258)	6,693
Net decrease in interest-bearing deposit accounts	(82,804)	(93,889)
Proceeds from Federal Home Loan Bank advances	153,000	20,000
Repayments of Federal Home Loan Bank advances	(153,000)	(35,000)
Net decrease in other borrowings	(39,391)	(48,657)
Cash dividends paid on common stock	(948)	(934)
Excess tax benefit of share-based compensation	10	0
Payments for Repurchase of Preferred Stock and Preference Stock	1,006		0
Cash dividends paid on preferred stock	0	(438)
Proceeds from the issuance of equity instruments	1,324	0
Net cash used in financing activities	(204,373)	(152,225)
Net decrease in cash and cash equivalents	5,081	(12,973)
Cash and cash equivalents, beginning of period	116,370	188,143	188,143
Cash and cash equivalents, end of period	121,451	175,170	116,370
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	4,920	6,410
Cash paid during the period for income taxes	7,657	1,668
Noncash transactions:
Transfer to other real estate owned in settlement of loans	3,594	7,138
Sales of other real estate financed	1,896	40
Repayments of Long-term Debt	$ 300		$ 0