Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash Flows from Operating Activities
Net Income	$ 93,579	$ 55,962
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and accretion	3,115	8,243
Amortization of purchase accounting adjustments, net	(8,551)	(10,507)
Provision for loan losses	26,771	14,135
Share-based compensation cost - equity awards	7,702	6,749
Loss (gain) on sale of assets, net	3	(403)
Gain on sale of available for sale securities	(1,985)	(1,289)
Gain on sale of OREO, net	(4,711)	(1,980)
Amortization of premium/discount on securities, net	10,222	8,358
(Benefit) expense for deferred income taxes	(1,620)	2,407
Originations of mortgage loans held for sale	(1,227,825)	(1,179,016)
Proceeds from sales of mortgage loans held for sale	1,206,323	1,142,220
Realized and unrealized gains on mortgage loans held for sale, net	(45,563)	(34,072)
Tax benefit associated with share-based payment arrangements	(14)	(403)
Other operating activities, net	(11,814)	(6,298)
Net Cash Provided by Operating Activities	45,632	4,106
Cash Flows from Investing Activities
Proceeds from sales of available for sale securities	197,733	142,410
Proceeds from maturities, prepayments and calls of available for sale securities	215,115	258,571
Purchases of available for sale securities	(341,790)	(356,085)
Proceeds from maturities, prepayments and calls of held to maturity securities	5,603	15,016
Purchases of equity securities	(31,292)	(3,292)
Reimbursement of recoverable covered asset losses (to) from the FDIC	(4,234)	2,020
Increase in loans, net of loans acquired	(381,367)	(334,605)
Proceeds from sale of premises and equipment	1,188	468
Purchases of premises and equipment, net of premises and equipment acquired	(6,518)	(8,887)
Proceeds from disposition of OREO	20,365	26,463
Cash paid for additional investment in tax credit entities	(5,916)	(4,503)
Cash received in excess of cash paid for acquisitions	0	425,644
Other investing activities, net	(450)	4,758
Net Cash (Used in) Provided by Investing Activities	(331,563)	167,978
Cash Flows from Financing Activities
(Decrease) increase in deposits, net of deposits acquired	(316,483)	909,297
Net change in short-term borrowings, net of borrowings acquired	439,019	(578,966)
Proceeds from long-term debt	360,000	60,000
Repayments of long-term debt	(12,351)	(196,953)
Cash dividends paid on common stock	(28,006)	(24,354)
Cash dividends paid on preferred stock	(2,576)	0
Net share-based compensation stock transactions	(2,275)	1,669
Payments to repurchase common stock	(11,666)	0
Net proceeds from issuance of preferred stock	55,286	0
Tax benefit associated with share-based payment arrangements	14	403
Net Cash Provided by Financing Activities	480,962	171,096
Net Increase in Cash and Cash Equivalents	195,031	343,180
Cash and Cash Equivalents at Beginning of Period	510,267	548,095
Cash and Cash Equivalents at End of Period	705,298	891,275
Supplemental Schedule of Non-cash Activities
Acquisition of real estate in settlement of loans	3,910	8,619
Common stock issued in acquisitions	0	474,753
Supplemental Disclosures Cash Paid For
Interest on deposits and borrowings	30,244	26,932
Income taxes, net	$ 54,453	$ 18,901