Investments (Details) number in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Fixed maturities and equity investments unrealized loss positions	84		84		127
Other-than-temporary impairment loss	$ 0	$ 0	$ 0	$ 10
Limited liability investments	29,091		29,091		$ 20,141
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	1,800		1,800
Other investments, at cost which approximates fair value	7,251		7,251		4,077
Available-for-sale Securities Pledged as Collateral	13,263		13,263
Pledged Assets Separately Reported, Nonsecuritized Investments Pledged as Collateral, at Fair Value	17,300		17,300		$ 15,800
Reclassification out of Accumulated Other Comprehensive Income [Member]
Schedule of Available-for-sale Securities [Line Items]
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, before Tax, Portion Attributable to Parent	$ 0	$ 0	$ 0	$ 10