Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Beginning Balance	$ (2,888)
Total other comprehensive income	1,578		400
Ending Balance	(1,310)
Accumulated Net Unrealized Investment Gain (Loss)
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Beginning Balance	(2,860)	[1]	(1,707)	[1]
Other comprehensive income (loss) before reclassification	1,692	[1]	400	[1]
Amount reclassified from accumulated other comprehensive income (loss)	(127)	[1]		[1]
Total other comprehensive income	1,565	[1]	400	[1]
Ending Balance	(1,295)	[1]	(1,307)	[1]
Accumulated Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Beginning Balance	(28)
Other comprehensive income (loss) before reclassification	13
Amount reclassified from accumulated other comprehensive income (loss)
Total other comprehensive income	13
Ending Balance	$ (15)

[1] All amounts are net of tax. Amounts in parentheses indicate debits.