Reinsurance - Reinssurance Agreements (Details)	36 Months Ended
	Dec. 31, 2016 USD ($)
Renaissance Reinsurance U.S., Inc.
A.M. Best Rating	A
Combined Retention (All 3 Reinsurers)	$ 500,000
Annual Aggregate Deductible	$ 0
Hannover Ruckversicherungs AG
A.M. Best Rating	A+
Combined Retention (All 3 Reinsurers)	$ 500,000
Annual Aggregate Deductible	$ 0
TOA Reinsurance Company of America
A.M. Best Rating	A+
Combined Retention (All 3 Reinsurers)	$ 500,000
Annual Aggregate Deductible	$ 0