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, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Accumulated Other Comprehensive Income Loss [Line Items]
Begining Balance			$ 7,899
Other comprehensive income (loss):
Change in net actuarial loss (see Note 15)	125	122	248	241
Tax effect on change in net actuarial loss	(44)	(43)	(87)	(84)
Net unrealized holding gains arising during the period	2,623	(2,006)	11,522	17
Tax effect on unrealized gains arising during the period	(918)	702	(4,033)	(6)
Reclassification adjustment for losses included in net realized gains (losses)	(1,597)	(1,219)	(2,773)	(1,117)
Tax effect on reclassification adjustment for gains and losses included in income tax expense	559	427	970	391
Other comprehensive income , net of tax	748	(2,017)	5,847	(558)
Ending Balance	13,746		13,746
Minimum Pension Liability [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Begining Balance			(2,954)	(2,978)
Other comprehensive income (loss):
Change in net actuarial loss (see Note 15)			248	241
Tax effect on change in net actuarial loss			(87)	(84)
Other comprehensive income , net of tax			161	157
Ending Balance	(2,793)	(2,821)	(2,793)	(2,821)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Begining Balance			10,853	9,424
Other comprehensive income (loss):
Net unrealized holding gains arising during the period			11,522	17
Tax effect on unrealized gains arising during the period			(4,033)	(6)
Reclassification adjustment for losses included in net realized gains (losses)			(2,773)	(1,117)
Tax effect on reclassification adjustment for gains and losses included in income tax expense			970	391
Other comprehensive income , net of tax			5,686	(715)
Ending Balance	16,539	8,709	16,539	8,709
Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Begining Balance			7,899	6,446
Other comprehensive income (loss):
Change in net actuarial loss (see Note 15)			248	241
Tax effect on change in net actuarial loss			(87)	(84)
Net unrealized holding gains arising during the period			11,522	17
Tax effect on unrealized gains arising during the period			(4,033)	(6)
Reclassification adjustment for losses included in net realized gains (losses)			(2,773)	(1,117)
Tax effect on reclassification adjustment for gains and losses included in income tax expense			970	391
Other comprehensive income , net of tax			5,847	(558)
Ending Balance	$ 13,746	$ 5,888	$ 13,746	$ 5,888