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]
Accumulated Other Comprehensive Income and (Loss), Pre-Tax Amount, Beginning of period			$ 4,254
Change in net unrealized gain (loss) on investments, Pre-Tax Amount	365	1,442	(4,011)	3,042
Reclassification adjustment for net realized investment (gains) losses			199
Accumulated Other Comprehensive Income and (Loss), Pre-Tax Amount, End of period	442		442
Accumulated Other Comprehensive Income (Loss), Tax (Expense) Benefit, Beginning of period			(1,641)
Change in net unrealized gain (loss) on investments, Tax (Expense) Benefit			1,547
Reclassification adjustment for realized losses, Tax (Expense) Benefit			(77)
Accumulated Other Comprehensive Income (Loss), Tax (Expense) Benefit, End of period	(171)		(171)
Accumulated Other Comprehensive Income (Loss), Net-of-Tax Amount, Beginning of period			2,613
Change in net unrealized gain (loss) on investments, Net-of-Tax Amount			(2,464)
Reclassification adjustment for realized losses, Net-of-Tax Amount			122
Accumulated Other Comprehensive Income (Loss), Net-of-Tax Amount, End of period	$ 271		$ 271