Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement of Cash Flows [Abstract]
Net cash provided by operating activities	$ 42,195	$ 31,096
Available-for-sale investment securities:
Purchases	(95,481)	(155,043)
Proceeds from sales	30,622	49,918
Proceeds from principal payments, calls and prepayments	93,172	95,107
Held-to-maturity investment securities:
Proceeds from principal payments	1,747	1,712
Net increase in loans	(94,149)	(43,102)
Net expenditures for premises and equipment	(4,893)	(7,049)
Proceeds from sales of other real estate owned	148	509
Investment in bank owned life insurance	(35,000)	0
Business acquisitions, net of cash received	(244)	97,277
Investment in limited partnership and tax credit funds	2,954	108
Net cash (used in) provided by investing activities	(107,032)	39,221
Financing activities:
Net increase in non-interest-bearing deposits	27,529	92,628
Net increase (decrease) in interest-bearing deposits	12,040	(123,889)
Net increase in short-term borrowings	2,421	40,888
Proceeds from long-term borrowings	55,000	0
Payments on long-term borrowings	(21,899)	(69,666)
Cash dividends paid	(8,215)	(7,426)
Purchase of treasury stock under share repurchase program	(4,965)	0
Repurchase of common shares in connection with employee incentive and director compensation plans to be held as treasury stock	369	628
Proceeds from issuance of common shares	15	0
Excess tax benefit from share-based payment awards	0	63
Net cash provided by (used in) financing activities	61,557	(68,030)
Net (decrease) increase in cash and cash equivalents	(3,280)	2,287
Cash and cash equivalents at beginning of period	71,115	61,454
Cash and cash equivalents at end of period	$ 67,835	$ 63,741