Investments Gains and Losses by Security Type (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gain (Loss)	$ 37	$ 0	$ 155	$ 112
Quarter to Date [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains	42	0
Available-for-sale, Gross Realized Gains, Fair Value at Sale	3,066	0	3,066	0
Available-for-sale Securities, Gross Realized Losses	(5)	0
Available-for-sale, Gross Realized Losses, Fair Value at Sale	200	0	200	0
Available-for-sale Securities, Gross Realized Gain (Loss)	37
Available-for-sale, Gross Realized Gains (Losses), Fair Value at Sale	3,266	0	3,266	0
Year to Date [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains			317	120
Available-for-sale, Gross Realized Gains, Fair Value at Sale	8,227	12,111	8,227	12,111
Available-for-sale Securities, Gross Realized Losses			(162)	(8)
Available-for-sale, Gross Realized Losses, Fair Value at Sale	9,634	3,086	9,634	3,086
Available-for-sale Securities, Gross Realized Gain (Loss)		0	155	112
Available-for-sale, Gross Realized Gains (Losses), Fair Value at Sale	17,861	15,197	17,861	15,197
Fixed Maturities [Member] | Quarter to Date [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains	42	0
Available-for-sale, Gross Realized Gains, Fair Value at Sale	3,066	0	3,066	0
Fixed Maturities [Member] | Year to Date [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains			198	110
Available-for-sale, Gross Realized Gains, Fair Value at Sale	7,340	12,046	7,340	12,046
Available-for-sale Securities, Gross Realized Losses			(141)	(8)
Available-for-sale, Gross Realized Losses, Fair Value at Sale	9,243	2,990	9,243	2,990
Equity Securities [Member] | Quarter to Date [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Losses	(5)	0
Available-for-sale, Gross Realized Losses, Fair Value at Sale	200	0	200	0
Equity Securities [Member] | Year to Date [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains			119	10
Available-for-sale, Gross Realized Gains, Fair Value at Sale	887	65	887	65
Available-for-sale Securities, Gross Realized Losses			(21)	0
Available-for-sale, Gross Realized Losses, Fair Value at Sale	$ 391	$ 96	$ 391	$ 96