Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flows from Operating Activities
Net Income	$ 141,647	$ 98,437
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and accretion	3,414	11,839
Amortization of purchase accounting adjustments, net	(13,803)	(14,657)
Provision for loan losses	39,255	19,197
Share-based compensation cost - equity awards	11,229	10,139
Gain on sale of assets, net	(64)	(2,384)
Gain on sale of available for sale securities	(1,997)	(1,569)
Gain on sale of OREO, net	(5,798)	(3,216)
Amortization of premium/discount on securities, net	16,288	13,217
Expense for deferred income taxes	3,008	3,244
Originations of mortgage loans held for sale	(1,922,021)	(1,880,856)
Proceeds from sales of mortgage loans held for sale	1,940,605	1,887,468
Realized and unrealized gains on mortgage loans held for sale, net	(77,271)	(60,109)
Tax benefit associated with share-based payment arrangements	(115)	(408)
Other operating activities, net	41,427	43,010
Net Cash Provided by Operating Activities	175,804	123,352
Cash Flows from Investing Activities
Proceeds from sales of available for sale securities	197,733	212,278
Proceeds from maturities, prepayments and calls of available for sale securities	349,361	367,064
Purchases of available for sale securities	(594,143)	(934,638)
Proceeds from maturities, prepayments and calls of held to maturity securities	7,597	17,937
Purchases of equity securities	(31,380)	0
Reimbursement of recoverable covered asset losses (to) from the FDIC	(7,173)	1,429
Increase in loans, net of loans acquired	(568,844)	(491,545)
Proceeds from sale of premises and equipment	1,200	9,113
Purchases of premises and equipment, net of premises and equipment acquired	(9,436)	(14,144)
Proceeds from disposition of OREO	28,089	38,739
Cash paid for additional investment in tax credit entities	(16,817)	(7,868)
Cash received in excess of cash paid for acquisitions	0	425,581
Other investing activities, net	(490)	14,695
Net Cash Used in Investing Activities	(644,303)	(361,359)
Cash Flows from Financing Activities
Increase in deposits, net of deposits acquired	344,130	1,092,943
Net change in short-term borrowings, net of borrowings acquired	386,655	(624,811)
Proceeds from long-term debt	346,754	63,125
Repayments of long-term debt	(13,826)	(200,031)
Cash dividends paid on common stock	(42,003)	(38,334)
Cash dividends paid on preferred stock	(6,077)	0
Net share-based compensation stock transactions	118	1,421
Payments to repurchase common stock	(11,666)	0
Net proceeds from issuance of preferred stock	55,285	77,463
Tax benefit associated with share-based payment arrangements	115	408
Net Cash Provided by Financing Activities	1,059,485	372,184
Net Increase in Cash and Cash Equivalents	590,986	134,177
Cash and Cash Equivalents at Beginning of Period	510,267	548,095
Cash and Cash Equivalents at End of Period	1,101,253	682,272
Supplemental Schedule of Non-cash Activities
Acquisition of real estate in settlement of loans	5,813	14,921
Common stock issued in acquisitions	0	474,753
Supplemental Disclosures Cash Paid For
Interest on deposits and borrowings	46,656	42,899
Income taxes, net	$ 54,560	$ 28,929