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Subsequent Events (Details) - USD ($) $ in Thousands			3 Months Ended
	Apr. 26, 2021	Apr. 22, 2021	Jun. 30, 2021	Mar. 31, 2021	Mar. 31, 2020
Subsequent Event
Transfer of certain legacy auto insurance liabilities				$ 0	$ 407,885
Pacific Valley Insurance Company, Inc. | DARAG Bermuda LTD | Scenario, Forecast
Subsequent Event
Insurance reserve, loss recognized			$ 20,200
Subsequent Event | Scenario, Plan | Discontinued Operations, Disposed of by Sale
Subsequent Event
Proceeds from the sales of assets	$ 550,000
Upfront proceeds from the sales of assets	200,000
Deferred proceeds from the sales of asset	$ 350,000
Unpaid consideration, term	5 years
Subsequent Event | Pacific Valley Insurance Company, Inc. | DARAG Bermuda LTD
Subsequent Event
Transfer of certain legacy auto insurance liabilities		$ 251,300
Reinsurance obligations		434,500
Unearned premiums		271,500
Subsequent Event | DARAG Bermuda LTD
Subsequent Event
Reserves for current period		$ 183,200

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