Investments Gains and Losses by Security Type (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains	$ 2,622	$ 390	$ 134
Available-for-sale, Gross Realized Gains, Fair Value at Sale	94,931	116,923	23,342
Available-for-sale Securities, Gross Realized Losses	(1,795)	(410)	(263)
Available-for-sale, Gross Realized Losses, Fair Value at Sale	42,657	12,918	43,779
Available-for-sale Securities, Gross Realized Gain (Loss)	827	(20)	(129)
Available-for-sale, Gross Realized Gains (Losses), Fair Value at Sale	137,588	129,841	67,121
Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains	727	92	103
Available-for-sale, Gross Realized Gains, Fair Value at Sale	87,141	5,598	23,187
Available-for-sale Securities, Gross Realized Losses	(595)	(228)	(261)
Available-for-sale, Gross Realized Losses, Fair Value at Sale	38,485	11,389	43,751
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Gross Realized Gains	1,895	298	31
Available-for-sale, Gross Realized Gains, Fair Value at Sale	7,790	111,325	155
Available-for-sale Securities, Gross Realized Losses	(1,200)	(182)	(2)
Available-for-sale, Gross Realized Losses, Fair Value at Sale	$ 4,172	$ 1,529	$ 28