Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 12,125	$ 15,131	$ 15,194
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	150	800	950
Deferred tax expense (benefit)	(175)	4,329	772
Depreciation and amortization	2,452	2,181	1,948
Amortization of investment security premiums and accretion of discounts, net	707	1,101	2,330
Stock based compensation	119	187	172
Contribution to pension plan	0	0	(5,000)
Net losses (gains) on sales of investment securities	(107)	12	(507)
Other-than-temporary impairment losses on investment securities	0	166	0
Net gains on sale of loans	0	0	0
Net (gains) losses on sale of premises, equipment and other assets	104	(794)	(1,040)
Deferred (gain) on sale of premises	(517)	(934)	0
(Gains) losses on sale of other real estate owned	35	(20)	(7)
Bank owned life insurance	(311)	0	0
Amortization of real estate limited partnership investments	1,257	1,039	1,516
Changes in assets and liabilities:
Net change in interest receivable	195	386	753
Net change in other assets	790	(1,635)	(2,333)
Net change in interest payable	(49)	(19)	2,196
Net change in other liabilities	(861)	634	(11,282)
Net cash provided by operating activities	15,915	22,564	5,662
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of investment securities available for sale	56,889	53,215	129,936
Proceeds from maturities of investment securities available for sale	37,235	99,979	186,540
Proceeds from maturities of investment securities held to maturity	15,486	7,254	151
Proceeds from redemption of Federal Home Loan Bank stock	3,118	649	485
Purchases of investment securities available for sale	(55,495)	(60,580)	(316,251)
Loan originations in excess of principal payments	(16,264)	(86,185)	(55,428)
Proceeds from sales of loans, net	0	2,378	0
Proceeds from sale of other assets	0	0	334
Proceeds from sale of premises and equipment	0	3,026	788
Proceeds from sales of other real estate owned	68	171	505
Real estate limited partnership investments	(1,822)	(247)	(1,750)
Investment in bank owned life insurance	0	(10,000)	0
Purchases of bank premises and equipment	(2,477)	(3,019)	(3,877)
Net cash provided by (used in) investing activities	36,738	6,640	(58,567)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net change in deposits	(14,804)	52,496	93,200
Net change in securities sold under agreement to repurchase, short-term	8,150	(37,206)	24,993
Principal payments on long-term debt	(83)	(80)	(20,079)
Cash dividends paid	(7,085)	(6,432)	(6,324)
Purchase of Treasury Stock	(82)	0	0
Sale of treasury stock	0	15	18
Increase in deferred compensation arrangements	0	237	213
Proceeds from exercise of stock options, net of withholding taxes	225	0	280
Tax benefit from exercise of stock options and distribution of shares in deferred compensation arrangements	14	8	20
Net cash provided by financing activities	(13,665)	9,038	92,321
Increase (decrease) in cash and cash equivalents	38,988	38,243	39,416
Cash and cash equivalents beginning of period	115,471	77,228	37,812
Cash and cash equivalents end of period	154,459	115,471	77,228
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Total interest payments	4,574	5,051	4,687
Total income tax payments	8,054	800	5,950
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES
Distribution of stock under deferred compensation arrangements	553	450	391
Distribution of treasury stock in lieu of cash dividend under dividend reinvestment plan	0	622	683
Non-cash exercise of stock options	124	181	130
Transfer of loans to other real estate owned	0	213	140
Transfer of securities from available for sale to held to maturity	12,626	152,887	0
Decrease in payable for investments purchased	$ 0	$ 0	$ (9,461)