Subsequent Events (Details) $ in Thousands	Jul. 16, 2020 USD ($) property	May 05, 2020 USD ($) claim	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Subsequent Event [Line Items]
Reinsurance payable			$ 57,953	$ 59,274
Subsequent Event
Subsequent Event [Line Items]
New claims filed, number | claim		1
Net adverse loss development		$ 63,800
Number Of Subsidiaries Entering Loss Portfolio Transfer Reinsurance Contract | property	5
Policyholder benefits and claims incurred, ceded	$ 240,000
Reinsurance premium	172,900
Reinsurers Deposit	$ 179,000
Collateral trust account deposit, threshold percentage of insurers net reserves	120.00%
Subsequent Event | First Layer Of Reinsurance By DARAG Bermuda [Member]
Subsequent Event [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured	$ 151,200
Reinsurance Retention Policy, Amount Retained	24,900
Subsequent Event | Second Layer Of Reinsurance By DARAG Bermuda [Member]
Subsequent Event [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured	27,800
Reinsurance Retention Policy, Amount Retained	$ 36,100