Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 33,830	$ 12,587
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan and lease losses	7,900	2,571
Depreciation of premises and equipment	4,151	3,059
Net amortization of investment securities premiums and discounts	1,416	1,238
Net gain on sales of investment securities	(43)	(487)
Net gain on mortgage banking activities	(3,558)	(4,935)
Bank owned life insurance income	(3,147)	(1,716)
Net accretion of acquisition accounting fair value adjustments	(2,572)	(947)
Stock-based compensation	2,550	1,407
Intangible expenses	1,895	2,611
Other adjustments to reconcile net income to cash (used in) provided by operating activities	(286)	3,035
Originations of loans held for sale	(105,557)	(187,553)
Proceeds from the sale of loans held for sale	112,602	192,207
Contributions to pension and other postretirement benefit plans	(2,206)	(2,181)
Decrease (increase) in accrued interest receivable and other assets	1,395	(2,771)
(Decrease) increase in accrued interest payable and other liabilities	(3,620)	5,777
Net cash provided by operating activities	44,750	23,902
Cash flows from investing activities:
Net cash paid due to acquisitions	0	(94,835)
Net capital expenditures	(5,040)	(9,292)
Proceeds from maturities, calls and principal repayments of securities held-to-maturity	21,796	17,000
Proceeds from maturities, calls and principal repayments of securities available-for-sale	72,306	86,092
Proceeds from sales of securities available-for-sale	3,538	75,265
Purchases of investment securities held-to-maturity	(42,585)	0
Purchases of investment securities available-for-sale	(28,849)	(58,820)
Net increase in other investments	(2,375)	(4,140)
Net increase in loans and leases	(204,866)	(239,949)
Net (increase) decrease in interest-earning deposits	(22,546)	30,829
Proceeds from sales of other real estate owned	3,996	0
Proceeds from bank owned life insurance	2,937	0
Net cash used in investing activities	(201,688)	(197,850)
Cash flows from financing activities:
Net increase in deposits	261,402	46,197
Net (decrease) increase in short-term borrowings	(164,080)	108,372
Proceeds from issuance of long-term debt	95,000	0
Repayment of long-term debt	(15,000)	0
Proceeds from issuance of subordinated notes	0	44,515
Payment of contingent consideration on acquisitions	(5,380)	(2,519)
Purchases of treasury stock	(3,285)	(2,429)
Stock issued under dividend reinvestment and employee stock purchase plans	1,839	1,848
Proceeds from exercise of stock options	1,527	737
Cash dividends paid	(15,966)	(11,719)
Net cash provided by financing activities	156,057	185,002
Net (decrease) increase in cash and due from banks	(881)	11,054
Cash and due from banks at beginning of year	48,757	32,356
Cash and due from banks at end of period	47,876	43,410
Supplemental disclosures of cash flow information:
Cash paid for interest	15,458	9,618
Cash paid for income taxes, net of refunds	12,448	6,461
Non cash transactions:
Transfer of loans to other real estate owned	649	2,347
Assets acquired through acquisitions	0	1,090,859
Liabilities assumed through acquisitions	$ 0	$ 911,316