Reclassifications Out Of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Net gain on sales of investments	$ 256	$ 670	$ 521	$ 1,237
Provision for income taxes	1,187	1,205	2,550	2,536
Net income	3,170	3,105	6,386	6,268
Salaries and employee benefits	3,696	3,309	7,303	6,491
Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Net income			255
Reclassification of defined benefit plan, before tax			(135)
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Net gain on sales of investments			521
Provision for income taxes			(177)
Net income			344
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes			(46)
Net income			(89)
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Net Amortization Prior Service Costs And Actuarial Gain/Loss For Supplemental Executive Retirement Plan [Member]
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Salaries and employee benefits			(165)
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Amortization Of Actuarial Gain/Loss For Supplemental Executive Retirement Plan [Member]
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Salaries and employee benefits			$ 30