Investments, Part IV (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Derivative (Liability) [Member]
Liabilities measured at fair value on a recurring basis [Abstract]
Balance, beginning of period	$ (876)	$ (1,553)
Realized impairment losses included in net income		0
Total unrealized gains included in comprehensive income	735	677
Balance, end of period	(141)	(876)
Contractual rate (in hundredths)	4.77%
3-month LIBOR rate (in hundredths)	0.31%
Fixed maturities [Member]
Assets measured at fair value on a recurring basis [Abstract]
Balance, beginning of period	2,035	1,943
Realized impairment losses included in net income		(965)
Total unrealized gains included in comprehensive income	89	1,057
Balance, end of period	$ 2,124	$ 2,035