Changes in Accumulated Other Comprehensive Income Balances (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Balance			$ 6,446
Other comprehensive income (loss):
Change in net actuarial loss	122	72	242	143
Tax effect on change in net actuarial gain	(43)	(25)	(85)	(50)
Net unrealized holding gains arising during the period	(2,006)	1,032	17	(120)
Tax effect on unrealized holding gains (losses) arising during the period	702	(361)	(6)	42
Reclassification adjustment for losses included in net income	(1,219)	(1,664)	(1,117)	(2,783)
Tax effect on reclassification adjustment for losses included in net income	427	582	391	974
Other comprehensive income (loss), net of tax	(2,017)	(364)	(558)	(1,794)
Balance	5,888		5,888
Minimum Pension Liability [Member]
Balance			(2,978)	(2,024)
Other comprehensive income (loss):
Change in net actuarial loss			242	143
Tax effect on change in net actuarial gain			85	50
Net unrealized holding gains arising during the period			0	0
Tax effect on unrealized holding gains (losses) arising during the period			0
Reclassification adjustment for losses included in net income			0	0
Tax effect on reclassification adjustment for losses included in net income			0	0
Other comprehensive income (loss), net of tax			157	93
Balance	(2,821)	(1,931)	(2,821)	(1,931)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Balance			9,424	11,661
Other comprehensive income (loss):
Change in net actuarial loss			0	0
Tax effect on change in net actuarial gain			0	0
Net unrealized holding gains arising during the period			17	(120)
Tax effect on unrealized holding gains (losses) arising during the period			6	(42)
Reclassification adjustment for losses included in net income			1,117	2,783
Tax effect on reclassification adjustment for losses included in net income			(391)	(974)
Other comprehensive income (loss), net of tax			(715)	(1,887)
Balance	8,709	9,774	8,709	9,774
Accumulated Other Comprehensive Income (Loss) [Member]
Balance			6,446	9,637
Other comprehensive income (loss):
Change in net actuarial loss			242	143
Tax effect on change in net actuarial gain			85	50
Net unrealized holding gains arising during the period			17	(120)
Tax effect on unrealized holding gains (losses) arising during the period			6	(42)
Reclassification adjustment for losses included in net income			1,117	2,783
Tax effect on reclassification adjustment for losses included in net income			(391)	(974)
Other comprehensive income (loss), net of tax			(558)	(1,794)
Balance	$ 5,888	$ 7,843	$ 5,888	$ 7,843