Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net income	$ 35,235	$ 24,121
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	11,811	8,976
Provision for loan losses	1,898	11,408
Deferred income taxes	11,712	3,173
Gain on sale of securities		(61)
Gains on OREO sales	(8,809)	(6,961)
Share-based compensation expense	2,332	1,292
Loss on disposal of premises and equipment	5	2
Amortization of FDIC indemnification asset	22,106	14,226
Accretion on acquired loans	(75,365)	(36,983)
Net amortization of investment securities	3,014	2,671
OREO write downs	5,180	13,648
Net change in:
Loans held for sale	32,676	(25,776)
Accrued interest receivable	(3,462)	2,682
Prepaid assets	4,166	1,108
FDIC loss share receivable	37,629	74,105
Accrued interest payable	(1,629)	(1,443)
Accrued income taxes	33,144	(9,071)
Miscellaneous assets and liabilities	(12,637)	(40,956)
Net cash provided by operating activities	99,006	36,162
Cash flows from investing activities:
Proceeds from sales of investment securities available for sale	177,468	25,359
Proceeds from maturities and calls of investment securities held to maturity	3,014
Proceeds from maturities and calls of investment securities available for sale	121,535	73,306
Proceeds from sales of other investment securities	17,019	12,429
Purchases of investment securities available for sale	(121,018)	(110,081)
Net decrease in customer loans	185,003	90,835
Net cash received from acquisitions	173,502	10,923
Purchases of premises and equipment	(7,291)	(11,509)
Proceeds from sale of premises and equipment	50	33
Proceeds from sale of OREO	44,578	50,884
Net cash provided by investing activities	593,860	142,179
Cash flows from financing activities:
Net decrease in deposits	(157,066)	(100,243)
Net increase (decrease) in federal funds purchased and securities sold under agreements to repurchase	(4,829)	36,352
Repayment of other borrowings	(256,072)	(875)
Common stock issuance	402	361
Common stock repurchased	(673)	(674)
Dividends paid on preferred stock	(542)
Dividends paid on common stock	(10,699)	(7,522)
Stock options exercised	1,054	899
Net cash used in financing activities	(428,425)	(71,702)
Net increase in cash and cash equivalents	264,441	106,639
Cash and cash equivalents at beginning of period	380,730	171,425
Cash and cash equivalents at end of period	645,171	278,064
Cash paid for:
Interest	5,199	9,076
Income taxes	8,408	18,216
Noncash investing activities:
Transfers of loans to foreclosed properties (covered of $16,986 and $19,146, respectively; and non-covered of $22,106 and $21,185, respectively)	$ 39,092	$ 40,331