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), Net of Tax [Roll Forward]
Beginning balance	$ (942)	$ 4,456	$ 4,184	[1]	$ 3,863
Other comprehensive income (loss) before reclassifications	(70)	1,214	(5,026)		1,992
Amounts reclassified from accumulated comprehensive income:
Realized gain on sale of securities	(253)	(1,348)	(529)		(1,648)
Impairment expense	0	0	0		0
Reclassified amounts before tax	(253)	(1,348)	(529)		(1,648)
Tax expense	98	519	204		634
Total reclassifications net of tax	(155)	(829)	(325)		(1,014)
Net current period other comprehensive income (loss)	(225)	385	(5,351)		978
Ending balance	$ (1,167)	$ 4,841	$ (1,167)		$ 4,841

[1] Derived from audited consolidated financial statements