Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Unrealized gain on securities:
Unrealized gain on available-for-sale securities, Pre-tax Amount	$ 2,555	$ 3,127	$ (632)
Unrealized gain on available-for-sale securities, Tax Expense	894	1,094	(221)
Other Comprehensive Income Unrealized Gain Loss On Available For Sale Securities Arising During Period Net Of Tax	1,661	2,033	(411)
Change in unrealized losses on fixed maturity securities with OTTI, Pre-Tax Amount	1	(21)
Change in unrealized losses on fixed maturity securities with OTTI, Tax Expense		(7)
Change in unrealized losses on fixed maturity securities with OTTI, Net-of-Tax Amount	1	(14)
Less amortization of differences between fair value and amortized cost for fixed maturity security transfer, Pre-tax Amount	(101)	(159)	(405)
Less amortization of differences between fair value and amortized cost for fixed maturity security transfer, Tax Expense	(35)	(56)	(141)
Less amortization of differences between fair value and amortized cost for fixed maturity security transfer, Net-of-Tax Amount	(66)	(103)	(264)
Less reclassification adjustment for gains realized in net income, Pre-Tax Amount	(1,279)	107	(1,651)
Less reclassification adjustment for gains realized in net income, Tax Expense	(447)	37	(578)
Less reclassification adjustment for gains realized in net income, Net-of-Tax Amount	(832)	70	(1,073)
Change in deferred tax valuation allowance, Tax Expense		36	715
Change in deferred tax valuation allowance	0	(36)	(715)
Net unrealized gain, Pre-Tax Amount	1,176	3,054	(2,688)
Net unrealized gain, Tax Expense	412	1,104	(225)
Net unrealized gain, Net-of-Tax Amount	764	1,950	(2,463)
Other comprehensive income, Pre-Tax Amount	1,176	3,054	(2,688)
Other comprehensive income, Tax Expense	412	1,104	(225)
Other comprehensive income, Net-of-Tax Amount	$ 764	$ 1,950	$ (2,463)