Consolidated Statements Of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Consolidated Statements Of Comprehensive Income (Unaudited)
Change in accumulated unrealized plan loss for pension and other postretirement obligations	$ 134	$ 67
Unrealized holding (loss) gain on financial derivative:
Change in unrealized holding (loss) gains on financial derivative	(8)	10
Reclassification adjustment for interest expense included in net income	14	15
Net unrealized gain on financial derivative	6	25
Unrealized holding gains on available-for-sale securities:
Unrealized holding gains arising during the period	167	482
Reclassification adjustment for net gains included in income	(112)	(27)
Net unrealized gains on securities available-for-sale	55	455
Other comprehensive income, before tax	195	547
Tax effect	(78)	(219)
Other comprehensive income, net of tax	117	328
Net income	529	426
Total Comprehensive income	646	754
Tax Effect Allocated to Each Component of Comprehensive Income
Unrealized gain on pension and other postretirement obligations	(53)	(27)
Unrealized gain on financial derivative instruments used in cash flow hedging relationships	(2)	(10)
Unrealized gains on available-for-sale securities arising during the period	(23)	(182)
Income tax expense related to other comprehensive income	(78)	(219)
Accumulated Other Comprehensive Loss By Component:
Unrealized loss and transition obligation for pension and other postretirement obligations	(5,895)		(6,029)
Tax effect	2,358		2,412
Net unrealized loss for pension and other postretirement obligations	(3,537)		(3,617)
Unrealized loss on financial derivative instruments used in cash flow hedging relationships	(194)		(200)
Tax effect	78		80
Net unrealized loss on financial derivative instruments used in cash flow hedging relationships	(116)		(120)
Unrealized gain on available-for-sale securities	1,844		1,789
Tax effect	(738)		(716)
Net unrealized gain on available-for-sale securities	1,106		1,073
Accumulated other comprehensive loss	$ (2,547)		$ (2,664)