Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income		$ 32,171	$ 33,830
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan and lease losses		20,207	7,900
Depreciation of premises and equipment		4,180	4,151
Net amortization of investment securities premiums and discounts		1,193	1,416
Net gain on sales of investment securities	[1]	(10)	(43)
Net gain on mortgage banking activities	[1]	(2,412)	(3,558)
Bank owned life insurance income	[1]	(2,744)	(3,147)
Net accretion of acquisition accounting fair value adjustments		(838)	(2,572)
Stock-based compensation		2,379	2,550
Intangible expenses		1,685	1,895
Other adjustments to reconcile net income to cash provided by (used in) operating activities		117	(286)
Originations of loans held for sale		(95,665)	(105,557)
Proceeds from the sale of loans held for sale		99,842	112,602
Contributions to pension and other postretirement benefit plans		(3,199)	(2,206)
Decrease in accrued interest receivable and other assets		379	1,395
Increase (decrease) in accrued interest payable and other liabilities		4,021	(3,620)
Net cash provided by operating activities		61,306	44,750
Cash flows from investing activities:
Net capital expenditures		(2,596)	(5,040)
Proceeds from maturities, calls and principal repayments of securities held-to-maturity		7,846	21,796
Proceeds from maturities, calls and principal repayments of securities available-for-sale		44,603	49,271
Proceeds from sales of securities available-for-sale		1,010	3,538
Purchases of investment securities held-to-maturity		(60,784)	(42,585)
Purchases of investment securities available-for-sale		(1,986)	(9,974)
Proceeds from sales of money market mutual funds		11,215	23,035
Purchases of money market mutual funds		(6,392)	(18,875)
Net increase in other investments		(5,867)	(2,375)
Net increase in loans and leases		(260,012)	(204,866)
Net increase in interest-earning deposits		(3,222)	(22,546)
Proceeds from sales of other real estate owned		362	3,996
Purchases of bank owned life insurance		(776)	0
Proceeds from bank owned life insurance		1,374	2,937
Net cash used in investing activities		(275,225)	(201,688)
Cash flows from financing activities:
Net increase in deposits		265,260	261,402
Net decrease in short-term borrowings		(18,666)	(164,080)
Proceeds from issuance of long-term debt		0	95,000
Repayment of long-term debt		10,000	15,000
Payment of contingent consideration on acquisitions		(67)	(5,380)
Purchases of treasury stock		(2,384)	(3,285)
Stock issued under dividend reinvestment and employee stock purchase plans		1,739	1,839
Proceeds from exercise of stock options		1,131	1,527
Cash dividends paid		(17,615)	(15,966)
Net cash provided by financing activities		219,398	156,057
Net increase (decrease) in cash and due from banks		5,479	(881)
Cash and due from banks at beginning of year		46,721	48,757
Cash and due from banks at end of period		52,200	47,876
Supplemental disclosures of cash flow information:
Cash paid for interest		21,647	15,458
Cash paid for income taxes, net of refunds		1,315	12,448
Non cash transactions:
Transfer of loans to other real estate owned		$ 477	$ 649

[1] (1)Net interest income as well as many other revenues for financial assets and liabilities including loans, leases, securities, and derivatives are excluded from the scope of the standard. Noninterest income streams that are out-of-scope of the standard include bank owned life insurance income, sales of investment securities and mortgage banking activities.