Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 49,219	$ 30,032	$ 22,595
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	17,495	12,092	10,767
Provision for loan losses	1,886	13,619	30,236
Deferred income taxes	(120)	25,086	(10,201)
Other-than-temporary impairment on securities			115
Gain on sale of securities available for sale		(189)	(323)
Gain on acquisition			(16,529)
Share-based compensation expense	3,322	1,741	1,777
Amortization on FDIC indemnification asset	29,535	20,773	10,135
Accretion on acquired loans	(99,609)	(52,011)	(16,099)
Loss on sale of assets	4	10	63
Gain on sale of OREO	(13,357)	(8,482)	(2,655)
Net amortization of premium on investment securities	3,917	3,893	1,682
OREO write downs	8,109	13,190	29,010
Originations and purchases of mortgage loans for sale	(846,772)	(908,034)	(548,794)
Proceeds from sales of mortgage loans for sale	901,330	888,564	545,689
Net change in:
Accrued interest receivable	953	5,252	1,941
Prepaid assets	1,738	1,239	3,743
FDIC Loss Share Receivable	52,081	95,707	77,488
Miscellaneous other assets	(3,320)	(894)	1,855
Accrued interest payable	(1,729)	(1,651)	(4,382)
Accrued income taxes	40,317	(12,502)	2,064
Miscellaneous other liabilities	4,522	(8,921)	14,768
Net cash provided by operating activities	149,521	118,514	154,945
Cash flows from investing activities:
Proceeds from sales of investment securities available for sale	177,468	29,301	52,282
Proceeds from maturities and calls of investment securities held to maturity	3,014	1,129	3,370
Proceeds from maturities of investment securities available for sale	142,163	101,582	100,026
Proceeds from sales of other investment securities	17,019	13,251	7,781
Purchases of investment securities available for sale	(286,912)	(130,078)	(146,272)
Purchases of other investment securities			(1,041)
Net (increase) decrease in customer loans	226,359	49,950	(74,892)
Net cash received from acquisitions	173,503	97,093	136,717
Purchases of premises and equipment	(13,751)	(8,387)	(19,463)
Proceeds from sale of OREO	72,380	75,970	56,809
Proceeds from sale of premises and equipment	64	58	28
Net cash provided by investing activities	511,307	229,869	115,345
Cash flows from financing activities:
Net decrease in deposits	(264,673)	(142,812)	(290,906)
Net increase (decrease) in federal funds purchased and securities sold under agreements to repurchase and other short-term borrowings	(27,220)	35,152	(12,338)
Repayment of FHLB advances	(255,443)	(22,168)	(59,128)
Common stock issuance	781	720	35,533
Common stock repurchased	(933)	(836)	(342)
Dividends paid on preferred stock	(1,354)
Dividends paid on common stock	(15,274)	(10,244)	(9,514)
Stock options exercised	1,885	1,244	731
Net cash used in financing activities	(562,231)	(138,944)	(335,964)
Net increase (decrease) in cash and cash equivalents	98,597	209,305	(65,674)
Cash and cash equivalents at beginning of period	380,730	171,425	237,099
Cash and cash equivalents at end of period	479,461	380,730	171,425
Cash paid for:
Interest	14,063	11,303	22,870
Income taxes	16,358	6,504	12,981
Acquisitions:
Fair value of tangible assets acquired	3,018,522	1,321,482	540,547
Other intangible assets acquired	59,931	15,833	3,813
Liabilities assumed	284,637	1,261,563	603,774
Net identifiable assets acquired over (under) liabilities assumed	230,816	75,752	(59,414)
Common stock issued in acquisition	381,423	100,014
Preferred stock issued in acquisition	65,000
Real estate acquired in full or in partial settlement of loans (covered of $20,559, $20,631, and $39,793, respectively; and non-covered of $33,760, $25,958, and $21,342, respectively)	$ 54,319	$ 46,589	$ 61,135