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Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Schedule of changes in component of accumulated other comprehensive income (loss)
Net Unrealized Gains (Losses) on Securities, Beginning Balance	$ 1,770	$ 3,166
Adjustments Related to Pension Benefits, Beginning Balance	(2,629)	(2,175)
Accumulated Other Comprehensive Income (Loss), Beginning Balance	(859)	991
Net unrealized losses on investment securities	(132)	(121)
Net unrealized losses on investment securities, Adjustments Related to Pension Benefits
Net unrealized losses on investment securities, Accumulated Other Comprehensive Income (Loss)	(132)	(121)
Reclassification adjustment, Net Unrealized Gains (Losses) on Securities		(1,117)
Reclassification adjustment, Adjustments Related to Pension Benefits
Reclassification adjustment, Accumulated Other Comprehensive Income (Loss)		(1,117)
Net Unrealized Gains (Losses) on Securities, Ending Balance	1,638	1,928
Adjustments Related to Pension Benefits, Ending Balance	(2,629)	(2,175)
Accumulated Other Comprehensive Income (Loss), Ending Balance	$ (991)	$ (247)

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Other comprehensive income loss reclassification adjustment for sale of securities included in accumulated other comprehensive income loss.

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Net of tax amount of the (increase) decrease in the value of the projected benefit obligation and the increase (decrease) in the value of the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption that has not been recognized in net periodic benefit cost.

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Net of tax amount, before reclassification adjustments, of the change in accumulated other comprehensive income (loss) related to pension and other postretirement benefit plans.

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