Investments Gains and Losses by Security Type (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gain (Loss)	$ (149)	$ 37	$ (161)	$ 118
Quarter to Date [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains	17	185	59	275
Available-for-sale, Gross Realized Gains, Fair Value at Sale	2,177	4,166	14,282	5,161
Available-for-sale Securities, Gross Realized Losses	(166)	(148)	(220)	(157)
Available-for-sale, Gross Realized Losses, Fair Value at Sale	21,679	9,281	38,675	9,434
Available-for-sale Securities, Gross Realized Gain (Loss)	(149)	37	(161)	118
Available-for-sale, Gross Realized Gains (Losses), Fair Value at Sale	23,856	13,447	52,957	14,595
Fixed Maturities [Member] | Quarter to Date [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains	4	156	28	156
Available-for-sale, Gross Realized Gains, Fair Value at Sale	2,127	4,016	14,127	4,274
Available-for-sale Securities, Gross Realized Losses	164	141	218	141
Available-for-sale, Gross Realized Losses, Fair Value at Sale	21,651	9,243	38,647	9,243
Equity Securities [Member] | Quarter to Date [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains	13	29	31	119
Available-for-sale, Gross Realized Gains, Fair Value at Sale	50	150	155	887
Available-for-sale Securities, Gross Realized Losses	2	7	2	16
Available-for-sale, Gross Realized Losses, Fair Value at Sale	$ 28	$ 38	$ 28	$ 191