Related Party Transactions (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Legal Fees
Related Party Transaction
Amounts of Transactions	$ 775,000	$ 513,000	$ 1,643,000	$ 1,109,000
Spouse of Executive Officer | Legal Fees
Related Party Transaction
Amounts of Transactions	$ 388,000	$ 257,000	$ 822,000	$ 555,000
Related party interest in billings (percentage)			50.00%
Director | AmRisc gross written premiums
Related Party Transaction
Amounts of Transactions			$ 110,310,000
Director | AmRisc Fees and Commission
Related Party Transaction
Amounts of Transactions			16,823,000
Director | AmRisc ceded premiums written
Related Party Transaction
Amounts of Transactions			1,772,000
Director | AmRisc Rent
Related Party Transaction
Amounts of Transactions			16,000
Director | AmRisc net premiums receivable
Related Party Transaction
Amounts of Transactions			$ 46,929,000