CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 184,326	$ 135,809
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	20,367	18,408
Stock-based compensation	15,840	9,563
Provision for credit losses	24,642	7,742
Net amortization of premiums and accretion of discounts on securities and borrowings	26,262	17,476
Amortization of other intangible assets	13,607	7,596
Losses (gains) on securities transactions, net	880	(5)
Proceeds from sales of loans held for sale	591,583	484,102
Gains on sales of loans, net	(18,143)	(14,439)
Originations of loans held for sale	(307,623)	(201,393)
Losses on sales of assets, net	2,122	359
Net change in:
Cash surrender value of bank owned life insurance	(6,960)	(5,705)
Accrued interest receivable	(6,553)	(5,247)
Other assets	(39,120)	(7,052)
Accrued expenses and other liabilities	(5,941)	(17,465)
Net cash provided by operating activities	495,289	429,749
Cash flows from investing activities:
Net loan originations and purchases	(2,324,977)	(1,200,913)
Investment securities held to maturity:
Purchases	(220,192)	(127,318)
Maturities, calls and principal repayments	195,448	219,967
Investment securities available for sale:
Purchases	(239,226)	(293,788)
Sales	38,625	0
Maturities, calls and principal repayments	194,312	144,221
Death benefit proceeds from bank owned life insurance	2,546	10,661
Proceeds from sales of real estate property and equipment	6,665	7,717
Purchases of real estate property and equipment	(16,880)	(13,341)
Cash and cash equivalents acquired in acquisition	156,612	0
Net cash used in investing activities	(2,207,067)	(1,252,794)
Cash flows from financing activities:
Net change in deposits	869,967	(417,942)
Net change in short-term borrowings	1,569,824	401,749
Proceeds from issuance of long-term borrowings, net	0	965,000
Repayments of long-term borrowings	(675,682)	(185,000)
Proceeds from issuance of preferred stock, net	0	98,101
Cash dividends paid to preferred shareholders	(9,516)	(6,277)
Cash dividends paid to common shareholders	(102,414)	(84,143)
Purchase of common shares to treasury	(2,780)	(2,284)
Common stock issued, net	2,648	5,166
Net cash provided by financing activities	1,652,047	774,370
Net change in cash and cash equivalents	(59,731)	(48,675)
Cash and cash equivalents at beginning of year	416,110	392,501
Cash and cash equivalents at end of period	356,379	343,826
Cash payments for:
Interest on deposits and borrowings	205,821	125,433
Federal and state income taxes	47,217	27,003
Supplemental schedule of non-cash investing activities:
Transfer of loans to other real estate owned	697	7,147
Transfer of loans to loans held for sale	289,633	225,541
Non-cash assets acquired:
Loans	3,735,162	0
Premises and equipment	62,066	0
Bank owned life insurance	49,052	0
Accrued interest receivable	12,123	0
Goodwill	395,073	0
Other intangible assets	45,906	0
Other assets	100,836	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
Net cash and cash equivalents acquired in acquisition	156,612	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