Changes in Accumulated Other Comprehensive Income Balances (Schedule of Changes in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ 17,801
Other comprehensive income (loss):
Change in net actuarial loss	$ 26	$ 40	78	$ 122
Tax effect on change in net actuarial gain	(9)	(14)	(27)	(43)
Net unrealized holding gains (losses) arising during the period	(10,821)	(221)	(7,858)	1,900
Tax effect on unrealized gains arising during the period	3,787	77	2,750	(665)
Reclassification adjustment for gains included in net realized gains (losses)	(28)	23	(5,881)	122
Tax effect on reclassification adjustment for gains (losses) included in net income	10	(8)	2,058	(43)
Other comprehensive income (loss), net of tax	(7,035)	(103)	(8,880)	1,393
Ending Balance	8,921		8,921
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			78	122
Tax effect on change in net actuarial gain			(27)	(43)
Other comprehensive income (loss), net of tax			51	79
Ending Balance	(2,549)	(1,401)	(2,549)	(1,401)
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			(7,858)	1,900
Tax effect on unrealized gains arising during the period			2,750	(665)
Reclassification adjustment for gains included in net realized gains (losses)			(5,881)	122
Tax effect on reclassification adjustment for gains (losses) included in net income			2,058	(43)
Other comprehensive income (loss), net of tax			(8,931)	1,314
Ending Balance	11,470	19,677	11,470	19,677
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			78	122
Tax effect on change in net actuarial gain			(27)	(43)
Net unrealized holding gains (losses) arising during the period			(7,858)	1,900
Tax effect on unrealized gains arising during the period			2,750	(665)
Reclassification adjustment for gains included in net realized gains (losses)			(5,881)	122
Tax effect on reclassification adjustment for gains (losses) included in net income			2,058	(43)
Other comprehensive income (loss), net of tax			(8,880)	1,393
Ending Balance	$ 8,921	$ 18,276	$ 8,921	$ 18,276