Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net income	$ 73,938	$ 54,189
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	15,704	15,846
Provision for loan losses	5,038	5,109
Deferred income taxes	1,213	7,301
(Gain) loss on sale of securities available for sale		2
Share-based compensation expense	4,314	3,022
Amortization on FDIC indemnification asset	7,120	17,718
Accretion on acquired loans	(4,777)	(7,580)
Loss on sale of assets	432	1,402
Gain on sale of OREO	(1,492)	(6,826)
Net amortization of premium on investment securities	3,293	3,057
OREO write downs	7,673	8,673
Originations and purchases of mortgage loans for sale	(725,597)	(560,000)
Fair Value adjustment for loans held for sale	(104)
Proceeds from mortgage loans for sale	738,558	533,982
Net change in:
Accrued interest receivable	(248)	(4,129)
Prepaid assets	187	4,845
FDIC indemnification asset	7,098	37,567
Accrued interest payable	(2,009)	(1,154)
Accrued income taxes	15,435	(5,813)
Miscellaneous other liabilities	4,109	(12,542)
Net cash provided by operating activities	149,885	94,669
Cash flows from investing activities:
Proceeds from sales of investment securities available for sale		9,315
Proceeds from maturities and calls of investment securities held to maturity	345	1,535
Proceeds from maturities of investment securities available for sale	175,875	114,441
Proceeds from sales of investment securities held to maturity		411
Proceeds from calls of other investment securities	1,392
Proceeds from sales of other investment securities	95	2,868
Purchases of investment securities available for sale	(255,218)	(131,823)
Purchases of other investment securities		(6,186)
Proceeds from sale of credit card loans		20,350
Net (increase) decrease in customer loans	(175,094)	(21,877)
Net cash received from acquisitions	403,548
Purchases of premises and equipment	(11,677)	(13,258)
Proceeds from sale of OREO	28,189	48,102
Proceeds from sale of premises and equipment	25	3,914
Net cash provided by (used in) investing activities	167,480	27,792
Cash flows from financing activities:
Net decrease in deposits	178,675	(37,269)
Net increase (decrease) in federal funds purchased and securities sold under agreements to repurchase and other short-term borrowings	38,980	19,828
Repayment of FHLB advances	(46,397)	(1,186)
Common stock issuance	444	413
Preferred stock redeemed		(65,000)
Common stock repurchase	(1,101)	(404)
Dividends paid on preferred stock		(1,073)
Dividends paid on common stock	(17,413)	(14,474)
Stock options exercised	958	271
Net cash used in financing activities	154,146	(98,894)
Net increase (decrease) in cash and cash equivalents	471,511	23,567
Cash and cash equivalents at beginning of period	417,869	479,461
Cash and cash equivalents at end of period	889,380	503,028
Cash paid for:
Interest	9,993	12,988
Income taxes	21,946	22,239
Schedule of Noncash Investing Transactions:
Real estate acquired in full or in partial settlement of loans (covered of $6,832 and $13,393, respectively; and non-covered of $16,190 and $22,888, respectively)	$ 23,022	$ 36,281