Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Legal Fees
Related Party Transaction
Amounts of Transactions	$ 871	$ 756	$ 2,513	$ 1,865
Spouse of Executive Officer | Legal Fees
Related Party Transaction
Amounts of Transactions	436	$ 378	$ 1,257	$ 933
Related party interest in billings (percentage)			50.00%
Director | AmRisc gross written premiums
Related Party Transaction
Amounts of Transactions	41,311		$ 151,621
Related party interest in billings (percentage)			7.70%
Director | AmRisc Fees and Commission
Related Party Transaction
Amounts of Transactions	12,011		$ 28,834
Director | AmRisc ceded premiums written
Related Party Transaction
Amounts of Transactions	640		2,412
Director | AmRisc Rent
Related Party Transaction
Amounts of Transactions	$ 4		20
Director | AmRisc net premiums receivable
Related Party Transaction
Amounts of Transactions			$ 17,510