Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 27,268	$ 22,231	$ 21,189
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan and lease losses	3,802	3,607	11,228
Depreciation of premises and equipment	3,757	3,243	2,927
Net gain on sales of investment securities	(1,265)	(635)	(3,389)
Net gain on mortgage banking activities	(4,838)	(2,182)	(4,523)
Net gain on sales and write-down of other real estate owned	(14)	(195)	(626)
Loss on termination of interest rate swap	0	0	1,866
Bank owned life insurance income	(1,295)	(1,628)	(2,968)
Net amortization on investment securities	1,284	1,690	2,729
Amortization, fair market value adjustments and capitalization of mortgage servicing rights	(368)	10	(1,367)
Net accretion of acquisition accounting fair value adjustments	(2,048)	0	0
Stock-based compensation	1,421	1,141	978
Intangible expenses	2,567	2,167	157
Other adjustments to reconcile net income to cash provided by operating activities	(119)	(627)	(246)
Deferred tax expense	3,816	4,162	933
Originations of loans held for sale	(209,464)	(131,461)	(265,732)
Proceeds from the sale of loans held for sale	212,613	132,278	273,665
Contributions to pension and other postretirement benefit plans	(2,271)	(254)	(2,243)
Increase in accrued interest receivable and other assets	(663)	(1,093)	(2,873)
Increase (decrease) in accrued interest payable and other liabilities	1,442	(587)	1,101
Net cash provided by operating activities	35,625	31,867	32,806
Cash flows from investing activities:
Net cash paid due to acquisitions	(2,967)	(9,260)	(2,170)
Net capital expenditures	(5,890)	(5,595)	(3,840)
Proceeds from maturities and calls of securities held-to-maturity	13,000	11,000	3,000
Proceeds from maturities and calls of securities available-for-sale	79,482	58,744	85,205
Proceeds from sales of securities available-for-sale	77,308	32,967	76,361
Purchases of investment securities available-for-sale	(162,722)	(65,215)	(81,712)
Proceeds from sale of loans transferred to held for sale	4,000	0	0
Proceeds from sale of credit card portfolio	0	8,940	0
Net increase in loans and leases	(181,037)	(100,981)	(74,338)
Net (increase) decrease in interest-earning deposits	(16,954)	30,070	11,190
Proceeds from sales of other real estate owned	14	891	4,359
Net decrease in federal funds sold	17,442	0	0
Purchases of bank owned life insurance	(8,000)	0	0
Proceeds from bank owned life insurance	0	0	3,540
Net cash (used in) provided by investing activities	(186,324)	(38,439)	21,595
Cash flows from financing activities:
Net increase (decrease) in deposits	147,572	16,843	(20,515)
Net (decrease) increase in short-term borrowings	(17,763)	4,217	(59,026)
Proceeds from issuance of subordinated notes	49,267	0	0
Repayment of subordinated debt	0	0	(375)
Payment for repurchase of trust preferred securities	0	0	(20,619)
Payment of contingent consideration on acquisitions	(2,631)	(310)	0
Purchases of treasury stock	(13,342)	(4,605)	(12,012)
Stock issued under dividend reinvestment and employee stock purchase plans and other employee benefit programs	2,434	2,462	2,422
Proceeds from exercise of stock options, including excess tax benefits	534	310	0
Cash dividends paid	(15,011)	(12,996)	(10,029)
Net cash provided by (used in) financing activities	151,060	5,921	(120,154)
Net decrease (increase) in cash and due from banks	361	(651)	(65,753)
Cash and due from banks at beginning of year	31,995	32,646	98,399
Cash and due from banks at end of period	32,356	31,995	32,646
Supplemental disclosures of cash flow information:
Cash paid for interest	8,099	4,118	5,997
Cash paid for income taxes, net of refunds	2,142	5,899	5,352
Non cash transactions:
Transfer of loans to other real estate owned	320	0	3,485
Transfer of loans to loans held for sale	4,000	8,926	0
Assets acquired through acquisitions	425,185	0	0
Liabilities assumed through acquisitions	389,795	0	0
Contingent consideration recorded as goodwill	$ 1,525	$ 6,105	$ 454