Investments Gains and Losses by Security Type (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gain (Loss)	$ 37	$ 112	$ 118	$ 112
Quarter to Date [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains	185	120
Available-for-sale, Gross Realized Gains, Fair Value at Sale	4,166	12,111	4,166	12,111
Available-for-sale Securities, Gross Realized Losses	(148)	(8)
Available-for-sale, Gross Realized Losses, Fair Value at Sale	9,281	2,990	9,281	2,990
Available-for-sale Securities, Gross Realized Gain (Loss)	37
Available-for-sale, Gross Realized Gains (Losses), Fair Value at Sale	13,447	15,101	13,447	15,101
Year to Date [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains			275	120
Available-for-sale, Gross Realized Gains, Fair Value at Sale	5,161	12,111	5,161	12,111
Available-for-sale Securities, Gross Realized Losses			(157)	(8)
Available-for-sale, Gross Realized Losses, Fair Value at Sale	9,434	3,086	9,434	3,086
Available-for-sale Securities, Gross Realized Gain (Loss)			118	112
Available-for-sale, Gross Realized Gains (Losses), Fair Value at Sale	14,595	15,197	14,595	15,197
Fixed Maturities [Member] | Quarter to Date [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains	156	110
Available-for-sale, Gross Realized Gains, Fair Value at Sale	4,016	12,046	4,016	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
Fixed Maturities [Member] | Year to Date [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains			156	110
Available-for-sale, Gross Realized Gains, Fair Value at Sale	4,274	12,046	4,274	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 Gains	29	10
Available-for-sale, Gross Realized Gains, Fair Value at Sale	150	65	150	65
Available-for-sale Securities, Gross Realized Losses	(7)	0
Available-for-sale, Gross Realized Losses, Fair Value at Sale	38	0	38	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			(16)	0
Available-for-sale, Gross Realized Losses, Fair Value at Sale	$ 191	$ 96	$ 191	$ 96