CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities
Net income	$ 114,767	$ 96,160
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	13,783	12,549
Stock-based compensation	12,153	6,872
Provision for credit losses	18,090	6,102
Net amortization of premiums and accretion of discounts on securities and borrowings	17,212	11,366
Amortization of other intangible assets	8,910	5,098
Losses on securities transactions, net	801	1
Proceeds from sales of loans held for sale	437,876	303,268
Gains on sales of loans, net	(14,395)	(8,919)
Originations of loans held for sale	(446,849)	(154,475)
Losses on sales of assets, net	222	453
Net change in
Cash surrender value of bank owned life insurance	(4,415)	(4,164)
Accrued interest receivable	(2,042)	(2,916)
Other assets	(55,464)	(1,521)
Accrued expenses and other liabilities	(16,281)	(20,709)
Net cash provided by operating activities	84,368	249,165
Cash flows from investing activities
Net loan originations and purchases	(1,158,514)	(707,654)
Investment securities held to maturity
Purchases	(100,160)	(60,230)
Maturities, calls and principal repayments	120,876	157,351
Investment securities available for sale
Purchases	(239,226)	(252,770)
Sales	38,625	0
Maturities, calls and principal repayments	124,635	87,188
Death benefit proceeds from bank owned life insurance	2,652	1,998
Proceeds from sales of real estate property and equipment	9,773	6,822
Purchases of real estate property and equipment	(12,811)	(12,976)
Cash and cash equivalents acquired in acquisition	156,612	0
Net cash used in investing activities	(1,057,538)	(780,271)
Cash flows from financing activities
Net change in deposits	(77,533)	(480,690)
Net change in short-term borrowings	1,479,305	653,484
Proceeds from issuance of long-term borrowings, net	0	560,000
Repayments of long-term borrowings	(300,027)	(175,000)
Cash dividends paid to preferred shareholders	(6,344)	(3,594)
Cash dividends paid to common shareholders	(65,989)	(58,000)
Purchase of common shares to treasury	(2,598)	(2,183)
Common stock issued, net	2,512	2,377
Net cash provided by financing activities	1,029,326	496,394
Net change in cash and cash equivalents	56,156	(34,712)
Cash and cash equivalents at beginning of year	416,110	392,501
Cash and cash equivalents at end of period	472,266	357,789
Cash payments for
Interest on deposits and borrowings	124,816	100,380
Federal and state income taxes	29,280	7,683
Supplemental schedule of non-cash investing activities
Transfer of loans to other real estate owned	672	5,865
Transfer of loans to loans held for sale	263,324	225,541
Non-cash assets acquired:
Loans	3,744,682	0
Premises and equipment	62,066	0
Bank owned life insurance	49,052	0
Accrued interest receivable	12,123	0
Goodwill	388,255	0
Other intangible assets	45,906	0
Other assets	98,134	0
Total non-cash assets acquired	4,922,820	0
Liabilities assumed:
Deposits	3,564,843	0
Short-term borrowings	649,979	0
Long-term borrowings	87,283	0
Junior subordinated debentures issued to capital trusts	13,249	0
Accrued expenses and other liabilities	26,848	0
Total liabilities assumed	4,342,202	0
Net non-cash assets acquired	580,618	0
Common stock issued in acquisition	737,230	0
Held-to-maturity Securities
Non-cash assets acquired:
Investment securities	214,217	0
Available for Sale Securities
Non-cash assets acquired:
Investment securities	$ 308,385	$ 0