Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash Flows from Operating Activities
Net Income	$ 98,437	$ 69,445
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and accretion	11,839	12,241
Amortization of purchase accounting adjustments, net	(14,657)	7,129
Provision for loan losses	19,197	12,565
Share-based compensation cost	10,139	8,927
Gain on sale of assets, net	(2,384)	7
Gain on sale of available for sale securities	(1,569)	(609)
Gain on sale of OREO, net	(3,216)	(3,253)
Impairment of FDIC loss share receivables and other long-lived assets	1,884	5,378
Amortization of premium/discount on securities, net	13,217	10,248
Provision (benefit) for deferred income taxes	3,244	(24,328)
Originations of mortgage loans held for sale	(1,880,856)	(1,218,684)
Proceeds from sales of mortgage loans held for sale	1,887,468	1,234,694
Gain on sale of mortgage loans held for sale, net	(60,109)	(41,412)
Tax benefit associated with share-based payment arrangements	(408)	(1,163)
Change in other assets, net of other assets acquired	25,633	23,514
Other operating activities, net	15,493	(14,914)
Net Cash Provided by Operating Activities	123,352	79,785
Cash Flows from Investing Activities
Proceeds from sales of available for sale securities	212,278	20,531
Proceeds from maturities, prepayments and calls of available for sale securities	367,064	413,069
Purchases of available for sale securities	(934,638)	(540,197)
Proceeds from maturities, prepayments and calls of held to maturity securities	17,937	32,880
Reimbursement of recoverable covered asset losses from (to) the FDIC	1,429	(457)
Increase in loans, net	(491,545)	(476,329)
Proceeds from sale of premises and equipment	9,113	6,217
Purchases of premises and equipment, net of premises and equipment acquired	(14,144)	(26,587)
Proceeds from disposition of OREO	38,739	69,124
Cash paid for additional investment in tax credit entities	(7,868)	(10,384)
Cash received in excess of cash paid for acquisitions	425,581	188,803
Other investing activities, net	14,695	(16,073)
Net Cash Used in Investing Activities	(361,359)	(339,403)
Cash Flows from Financing Activities
Increase in deposits, net of deposits acquired	1,092,943	497,970
Net change in short-term borrowings, net of borrowings acquired	(624,811)	77,338
Proceeds from long-term debt	63,125	4,637
Repayments of long-term debt	(200,031)	(21,012)
Cash dividends paid on common stock	(38,334)	(31,701)
Proceeds from common stock transactions	4,825	11,141
Payments to repurchase common stock	(3,404)	(3,307)
Net proceeds from issuance of preferred stock	77,463	0
Tax benefit associated with share-based payment arrangements	408	1,163
Net Cash Provided by Financing Activities	372,184	536,229
Net Increase in Cash and Cash Equivalents	134,177	276,611
Cash and Cash Equivalents at Beginning of Period	548,095	391,396
Cash and Cash Equivalents at End of Period	682,272	668,007
Supplemental Schedule of Noncash Activities
Acquisition of real estate in settlement of loans	14,921	20,219
Common stock issued in acquisitions	474,753	214,665
Supplemental Disclosures Cash paid for:
Income taxes, net	42,899	30,984
Income taxes, net	$ 28,929	$ 42,933