Significant Accounting Policies - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Allowance for Uncollectible Premium	$ 144,000	$ 132,000
Finite-Lived Intangible Asset, Useful Life	7 years
Schedule of Managing General Agent and Policy Fees [Line Items]
Assessments levied, for NCJUA	$ 415,000
Advertising Expense	$ 907,000	2,630,000	$ 1,819,000
Concentration Risk, Percentage	47.00%
Cash, FDIC Insured Amount	$ 159,288,000	$ 72,405,000
Cash, FDIC Insured Amount, Period Increase (Decrease)	86,883,000
FLORIDA | Policy Underwriting Fee [Member] | Option 1 [Member]
Schedule of Managing General Agent and Policy Fees [Line Items]
Policy Charges, Insurance	25
GEORGIA | Policy Underwriting Fee [Member]
Schedule of Managing General Agent and Policy Fees [Line Items]
Policy Charges, Insurance	25
RHODE ISLAND | Policy Underwriting Fee [Member]
Schedule of Managing General Agent and Policy Fees [Line Items]
Policy Charges, Insurance	25
HAWAII | Policy Underwriting Fee [Member]
Schedule of Managing General Agent and Policy Fees [Line Items]
Policy Charges, Insurance	50
TEXAS | Policy Underwriting Fee [Member] | Option 1 [Member]
Schedule of Managing General Agent and Policy Fees [Line Items]
Policy Charges, Insurance	25
TEXAS | Policy Underwriting Fee [Member] | Option 2 [Member]
Schedule of Managing General Agent and Policy Fees [Line Items]
Policy Charges, Insurance	75
TEXAS | Inspection Fees [Member]
Schedule of Managing General Agent and Policy Fees [Line Items]
Policy Charges, Insurance	25
LOUISIANA | Inspection Fees [Member]
Schedule of Managing General Agent and Policy Fees [Line Items]
Policy Charges, Insurance	125
MASSACHUSETTS | Inspection Fees [Member]
Schedule of Managing General Agent and Policy Fees [Line Items]
Policy Charges, Insurance	25
NEW JERSEY | Policy Underwriting Fee [Member]
Schedule of Managing General Agent and Policy Fees [Line Items]
Policy Charges, Insurance	$ 25