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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			$ 7,899
Other comprehensive (loss) income:
Change in net actuarial loss (see Note 15)	123	120	371	362
Tax effect on change in net actuarial loss	(43)	(42)	(130)	(127)
Net unrealized holding gains arising during the period	4,721	4,541	16,243	4,560
Tax effect on unrealized gains arising during the period	(1,652)	(1,589)	(5,685)	(1,596)
Reclassification adjustment for losses included in net realized gains (losses)	(6,950)	(926)	(9,723)	(2,044)
Tax effect on reclassification adjustment for gains and losses included in income tax expense	2,433	324	3,403	715
Other comprehensive income , net of tax	(1,368)	2,428	4,479	1,870
Ending Balance	12,378		12,378
Minimum Pension Liability [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			(2,954)	(2,978)
Other comprehensive (loss) income:
Change in net actuarial loss (see Note 15)			371	362
Tax effect on change in net actuarial loss			(130)	(127)
Other comprehensive income , net of tax			241	235
Ending Balance	(2,713)	(2,743)	(2,713)	(2,743)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			10,853	9,424
Other comprehensive (loss) income:
Net unrealized holding gains arising during the period			16,243	4,560
Tax effect on unrealized gains arising during the period			(5,685)	(1,596)
Reclassification adjustment for losses included in net realized gains (losses)			(9,723)	(2,044)
Tax effect on reclassification adjustment for gains and losses included in income tax expense			3,403	715
Other comprehensive income , net of tax			4,238	1,635
Ending Balance	15,091	11,059	15,091	11,059
Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance			7,899	6,446
Other comprehensive (loss) income:
Change in net actuarial loss (see Note 15)			371	362
Tax effect on change in net actuarial loss			(130)	(127)
Net unrealized holding gains arising during the period			16,243	4,560
Tax effect on unrealized gains arising during the period			(5,685)	(1,596)
Reclassification adjustment for losses included in net realized gains (losses)			(9,723)	(2,044)
Tax effect on reclassification adjustment for gains and losses included in income tax expense			3,403	715
Other comprehensive income , net of tax			4,479	1,870
Ending Balance	$ 12,378	$ 8,316	$ 12,378	$ 8,316