Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Cash Flows [Abstract]
Net cash provided by operating activities	$ 10,331	$ 10,757
Available-for-sale investment securities:
Purchases	(33,014)	(67,397)
Proceeds from sales	41,565	69,114
Proceeds from principal payments, calls and prepayments	15,642	31,446
Held-to-maturity investment securities:
Purchases	0	(3,231)
Proceeds from principal payments	312	116
Net (increase) decrease in loans	(29,981)	5,607
Net expenditures for premises and equipment	(1,674)	(1,776)
Proceeds from sales of other real estate owned	138	16
Proceeds from bank owned life insurance contracts	3,067	1,441
Business acquisitions, net of cash received	0	(1,524)
Investment in limited partnership and tax credit funds	358	0
Net cash (used in) provided by investing activities	(3,587)	33,812
Financing activities:
Net increase in non-interest-bearing deposits	7,738	23,816
Net increase in interest-bearing deposits	44,601	12,805
Net decrease in short-term borrowings	(44,813)	(15,374)
Payments on long-term borrowings	(1,668)	(1,756)
Cash dividends paid	(1,517)	(1,201)
Purchase of treasury stock	(266)	(31)
Proceeds from issuance of shares	2	1
Excess tax benefit from share-based payments	43	27
Net cash provided by financing activities	4,120	18,287
Net increase in cash and cash equivalents	10,864	62,856
Cash and cash equivalents at beginning of period	53,820
Cash and cash equivalents at end of period	$ 64,684	$ 125,398