Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash Flows from Operating Activities
Net income	$ 102,491	$ 93,579
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and accretion	9,282	3,115
Amortization of purchase accounting and market value adjustments	(20,142)	(8,551)
Provision for loan losses	18,204	26,771
Share-based compensation cost - equity awards	7,111	7,702
(Gain)/loss on sale of assets, net	(44)	3
(Gain)/loss on sale of available for sale securities	(59)	(1,985)
(Gain)/loss on sale of OREO, net	(2,906)	(4,711)
Amortization of premium/discount on securities, net	12,685	10,222
Derivative losses (gain) on swaps	(228)	0
Expense (benefit) for deferred income taxes	10,040	(1,620)
Originations of mortgage loans held for sale	(919,207)	(1,227,825)
Proceeds from sales of mortgage loans held for sale	965,042	1,206,323
Realized and unrealized (gain)/loss on mortgage loans held for sale, net	(33,110)	(45,563)
Other operating activities, net	(2,127)	(11,814)
Net Cash Provided by Operating Activities	147,032	45,646
Cash Flows from Investing Activities
Proceeds from sales of available for sale securities	64,144	197,733
Proceeds from maturities, prepayments and calls of available for sale securities	236,468	215,115
Purchases of available for sale securities	(856,187)	(341,790)
Proceeds from maturities, prepayments and calls of held to maturity securities	4,267	5,603
Purchases of held to maturity securities	0	0
Purchases of equity securities	(1,180)	(31,292)
Proceeds from sales of equity securities	5,059	300
Reimbursement of recoverable covered asset losses (to) from the FDIC	0	(4,234)
Increase in loans, net of loans acquired	(481,482)	(381,367)
Proceeds from sale of premises and equipment	2,365	1,188
Purchases of premises and equipment, net of premises and equipment acquired	(24,001)	(6,518)
Proceeds from disposition of OREO	9,949	20,365
Cash paid for investments in tax credit entities	(2,827)	(5,916)
Other investing activities, net	1,267	(750)
Net Cash Used in Investing Activities	(1,042,158)	(331,563)
Cash Flows from Financing Activities
Increase/(decrease) in deposits, net of deposits acquired	(554,983)	(316,483)
Net change in short-term borrowings, net of borrowings acquired	74,799	439,019
Proceeds from long-term debt	50,000	360,000
Repayments of long-term debt	(11,252)	(12,351)
Cash dividends paid on common stock	(34,476)	(28,006)
Cash dividends paid on preferred stock	(4,548)	(2,576)
Net share-based compensation stock transactions	(2,374)	(2,275)
Payments to repurchase common stock	0	(11,666)
Net proceeds from issuance of common stock	485,194	0
Net proceeds from issuance of preferred stock	0	55,286
Net Cash Provided by Financing Activities	2,360	480,948
Net Increase (Decrease) In Cash and Cash Equivalents	(892,766)	195,031
Cash and Cash Equivalents at Beginning of Period	1,362,126	510,267
Cash and Cash Equivalents at End of Period	469,360	705,298
Supplemental Schedule of Non-cash Activities
Acquisition of real estate in settlement of loans	6,467	3,910
Cash paid for:
Interest on deposits and borrowings	40,778	30,244
Income taxes, net	$ 40,872	$ 54,453