Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating Activities
Net income	$ 97,385	$ 67,432
Adjustments to reconcile net income to net cash flows provided by operating activities:
Depreciation, amortization and accretion	36,392	25,892
Provision for credit losses	27,606	28,408
Deferred tax expense	21,226	11,539
Net securities gains	(3,118)	(297)
Tax benefit of stock-based compensation	(724)	(143)
Loans originated for sale	(519,973)	(266,597)
Loans sold	380,522	263,112
Gain on sale of loans	(4,716)	(3,797)
Net change in:
Interest receivable	(462)	(215)
Interest payable	58	(131)
Bank owned life insurance	(5,063)	(3,355)
Other, net	(114,988)	(21,916)
Net cash flows (used in) provided by operating activities	(85,855)	99,932
Investing Activities
Net change in loans and leases	(582,236)	(438,448)
Securities available for sale:
Purchases	(592,601)	(622,544)
Sales	755,866	615,199
Maturities	247,930	256,722
Securities held to maturity:
Purchases	(782,281)	(588,138)
Sales	1,574	0
Maturities	214,739	158,240
Purchase of bank owned life insurance	(5,805)	(16,579)
Increase in premises and equipment	(34,832)	(27,311)
Net cash received in business combinations	196,964	245,762
Net cash flows used in investing activities	(580,682)	(417,097)
Financing Activities
Demand (non-interest bearing and interest bearing) and savings accounts	(45,049)	355,565
Time deposits	(143,154)	(79,850)
Short-term borrowings	1,126,769	9,114
Proceeds from issuance of long-term borrowings	77,223	28,168
Repayment of long-term borrowings	(133,162)	(37,942)
Net proceeds from issuance of common stock	3,702	6,603
Tax benefit of stock-based compensation	0	143
Cash dividends paid:
Preferred stock	(4,020)	(4,020)
Common stock	(64,561)	(50,708)
Net cash flows provided by financing activities	817,748	227,073
Net Increase (Decrease) in Cash and Cash Equivalents	151,211	(90,092)
Cash and cash equivalents at beginning of period	371,407	489,119
Cash and Cash Equivalents at End of Period	$ 522,618	$ 399,027