Changes in Accumulated Other Comprehensive Income Balances (Schedule of Changes in Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ 16,883
Other comprehensive income (loss):
Change in net actuarial loss	41	124	81	248
Tax effect on change in net actuarial gain	(14)	(43)	(28)	(87)
Net unrealized holding gains (losses) arising during the period	3,766	2,623	2,121	11,522
Tax effect on unrealized gains arising during the period	(1,318)	(918)	(742)	(4,033)
Reclassification adjustment for losses included in net realized gains (losses)	284	(1,597)	99	(2,773)
Tax effect on reclassification adjustment for (losses) gains included in net income tax expense	(99)	559	(35)	970
Other comprehensive income (loss), net of tax	2,660	748	1,496	5,847
Ending Balance	18,379		18,379
Minimum Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(1,480)	(2,954)
Other comprehensive income (loss):
Change in net actuarial loss			81	248
Tax effect on change in net actuarial gain			(28)	(87)
Other comprehensive income (loss), net of tax			53	161
Ending Balance	(1,427)	(2,793)	(1,427)	(2,793)
Unrealized Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			18,363	10,853
Other comprehensive income (loss):
Net unrealized holding gains (losses) arising during the period			2,121	11,522
Tax effect on unrealized gains arising during the period			(742)	(4,033)
Reclassification adjustment for losses included in net realized gains (losses)			99	(2,773)
Tax effect on reclassification adjustment for (losses) gains included in net income tax expense			(35)	970
Other comprehensive income (loss), net of tax			1,443	5,686
Ending Balance	19,806	16,539	19,806	16,539
Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			16,883	7,899
Other comprehensive income (loss):
Change in net actuarial loss			81	248
Tax effect on change in net actuarial gain			(28)	(87)
Net unrealized holding gains (losses) arising during the period			2,121	11,522
Tax effect on unrealized gains arising during the period			(742)	(4,033)
Reclassification adjustment for losses included in net realized gains (losses)			99	(2,773)
Tax effect on reclassification adjustment for (losses) gains included in net income tax expense			(35)	970
Other comprehensive income (loss), net of tax			1,496	5,847
Ending Balance	$ 18,379	$ 13,746	$ 18,379	$ 13,746