Liability for Unpaid Losses and Loss Adjustment Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Liability for Unpaid Claims and Claims Adjustment Expense
Unpaid losses and loss adjustment expenses	$ 711,042	$ 629,968	$ 760,357	$ 661,203
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	423,609	434,196	482,315	477,870
Liability for Unpaid Claims and Claims Adjustment Expense, Net	287,433	195,772	$ 278,042	$ 183,333
Current Year Claims and Claims Adjustment Expense	103,966	98,913
Prior Year Claims and Claims Adjustment Expense	(1,129)	5,634
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims	102,837	104,547
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year	30,935	31,215
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years	62,511	60,893
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid	93,446	92,108
Liability for Unpaid Claims and Claims Adjustment Expense, Reported Claims, Amount	294,679	258,550
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount	$ 416,363	$ 371,418