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		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ 16,883
Other comprehensive income (loss):
Change in net actuarial loss	40	123	122	371
Tax effect on change in net actuarial gain	(14)	(43)	(43)	(130)
Net unrealized holding gains (losses) arising during the period	(221)	4,721	1,900	16,243
Tax effect on unrealized gains arising during the period	77	(1,652)	(665)	(5,685)
Reclassification adjustment for losses included in net realized gains (losses)	23	(6,950)	122	(9,723)
Tax effect on reclassification adjustment for (losses) gains included in net income	(8)	2,433	(43)	3,403
Other comprehensive income (loss), net of tax	(103)	(1,368)	1,393	4,479
Ending Balance	18,276		18,276
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			122	371
Tax effect on change in net actuarial gain			(43)	(130)
Other comprehensive income (loss), net of tax			79	241
Ending Balance	(1,401)	(2,713)	(1,401)	(2,713)
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			1,900	16,243
Tax effect on unrealized gains arising during the period			(665)	(5,685)
Reclassification adjustment for losses included in net realized gains (losses)			122	(9,723)
Tax effect on reclassification adjustment for (losses) gains included in net income			(43)	3,403
Other comprehensive income (loss), net of tax			1,314	4,238
Ending Balance	19,677	15,091	19,677	15,091
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			122	371
Tax effect on change in net actuarial gain			(43)	(130)
Net unrealized holding gains (losses) arising during the period			1,900	16,243
Tax effect on unrealized gains arising during the period			(665)	(5,685)
Reclassification adjustment for losses included in net realized gains (losses)			122	(9,723)
Tax effect on reclassification adjustment for (losses) gains included in net income			(43)	3,403
Other comprehensive income (loss), net of tax			1,393	4,479
Ending Balance	$ 18,276	$ 12,378	$ 18,276	$ 12,378