Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net income	$ 22,595	$ 51,882	$ 13,595
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,767	9,290	6,874
Provision for loan losses	30,236	54,282	26,712
Deferred income taxes	(10,201)	23,979	(2,925)
Other-than-temporary impairment on securities	115	6,770	5,005
Gain on sale of securities available for sale	(323)	(292)	(82)
Gains on acquisitions	(16,529)	(98,081)
Share-based compensation expense	1,777	1,625	1,431
Federal Home Loan Bank advances prepayment fee		3,189
Amortization (accretion) on FDIC indemnification asset	10,135	(2,443)
Accretion on acquired loans	(16,099)	(927)
Loss on sale of assets	63	132	42
Net amortization of premium on investment securities	1,682	937	84
Net change in:
Originations and purchases of mortgage loans for sale	(548,794)	(619,185)	(727,629)
Proceeds from sales of mortgage loans for sale	545,689	594,045	725,807
Accrued interest receivable	1,941	4,287	1,252
Prepaid assets	3,743	3,967	(11,395)
FDIC Loss Share Receivable	77,488	67,130
Miscellaneous other assets	23,884	(50,103)	6,887
Accrued interest payable	(4,382)	(5,225)	(2,350)
Accrued income taxes	2,064	(6,047)	392
Miscellaneous other liabilities	14,768	4,259	(3,287)
Net cash provided by operating activities	150,619	43,471	40,413
Cash flows from investing activities:
Proceeds from sales of investment securities available for sale	52,282	45,030	2,410
Proceeds from maturities and calls of investment securities held to maturity	3,370	1,595	2,686
Proceeds from maturities of investment securities available for sale	100,026	144,663	80,298
Proceeds from sales of other investment securities	7,781	1,632	451
Purchases of investment securities available for sale	(146,272)	(117,473)	(75,672)
Purchases of other investment securities	(1,041)		(1,943)
Net (increase) decrease in customer loans	(13,757)	2,135	92,088
Net cash received from acquisitions	136,717	306,298
Purchases of premises and equipment	(19,463)	(24,173)	(6,337)
Proceeds from sale of premises and equipment	28	52	2
Net cash provided by investing activities	119,671	359,759	93,983
Cash flows from financing activities:
Net decrease in deposits	(290,906)	(108,997)	(48,635)
Net increase (decrease) in federal funds purchased and securities sold under agreements to repurchase and other short-term borrowings	(12,338)	26,942	(31,350)
Repayment of FHLB advances	(59,128)	(166,025)	(18,030)
Repayment of subordinated term loan		(15,000)
Preferred stock issuance, net of issuance costs			64,632
Preferred stock and common stock warrant repurchase			(66,179)
Common stock issuance	35,533	669	29,815
Common stock repurchased	(342)	(255)	(446)
Dividends paid on preferred stock			(1,115)
Dividends paid on common stock	(9,514)	(8,680)	(8,177)
Stock options exercised	731	307	532
Net cash used in financing activities	(335,964)	(271,039)	(78,953)
Net increase (decrease) in cash and cash equivalents	(65,674)	132,191	55,443
Cash and cash equivalents at beginning of period	237,099	104,908	49,465
Cash and cash equivalents at end of period	171,425	237,099	104,908
Cash paid for:
Interest	22,870	30,938	39,557
Income taxes	12,981	9,420	6,642
Acquisitions:
Fair value of tangible assets acquired	540,547	956,318
Other intangible assets acquired	3,813	8,535
Liabilities assumed	603,774	1,098,400
Net assets acquired over liabilities assumed	(59,414)	(133,547)
Real estate acquired in full or in partial settlement of loans (covered of $39,793, $55,947, and $0, respectively; and non-covered of $21,342, $25,585, and $10,500, respectively)	$ 61,135	$ 81,532	$ 10,500