Changes in Accumulated Other Comprehensive Income Balances (Schedule of Changes in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ 17,801
Other comprehensive income (loss):
Change in net actuarial loss	$ 26	$ 41	52	$ 81
Tax effect on change in net actuarial gain	(9)	(14)	(18)	(28)
Net unrealized holding gains (losses) arising during the period	(4,106)	3,766	2,963	2,121
Tax effect on unrealized gains arising during the period	1,437	(1,318)	(1,037)	(742)
Reclassification adjustment for gains included in net realized gains (losses)	(4,992)	284	(5,853)	99
Tax effect on reclassification adjustment for gains (losses) included in net income	1,747	(99)	2,048	(35)
Other comprehensive income (loss), net of tax	(5,897)	2,660	(1,845)	1,496
Ending Balance	15,956		15,956
Minimum Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(2,600)	(1,480)
Other comprehensive income (loss):
Change in net actuarial loss			52	81
Tax effect on change in net actuarial gain			(18)	(28)
Other comprehensive income (loss), net of tax			34	53
Ending Balance	(2,566)	(1,427)	(2,566)	(1,427)
Unrealized Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			20,401	18,363
Other comprehensive income (loss):
Net unrealized holding gains (losses) arising during the period			2,963	2,121
Tax effect on unrealized gains arising during the period			(1,037)	(742)
Reclassification adjustment for gains included in net realized gains (losses)			(5,853)	99
Tax effect on reclassification adjustment for gains (losses) included in net income			2,048	(35)
Other comprehensive income (loss), net of tax			(1,879)	1,443
Ending Balance	18,522	19,806	18,522	19,806
Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			17,801	16,883
Other comprehensive income (loss):
Change in net actuarial loss			52	81
Tax effect on change in net actuarial gain			(18)	(28)
Net unrealized holding gains (losses) arising during the period			2,963	2,121
Tax effect on unrealized gains arising during the period			(1,037)	(742)
Reclassification adjustment for gains included in net realized gains (losses)			(5,853)	99
Tax effect on reclassification adjustment for gains (losses) included in net income			2,048	(35)
Other comprehensive income (loss), net of tax			(1,845)	1,496
Ending Balance	$ 15,956	$ 18,379	$ 15,956	$ 18,379