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Reinsurance Reinsurance Recoverable Credit Ratings (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverable, Credit Quality Indicator, Date Updated	Mar. 31, 2020
Reinsurance recoverable	$ 565,036	$ 577,635
Reinsurance Recoverable, Allowance for Credit Loss	(1,502)	(4,400)	[1]
Reinsurance recoverable, net of allowance for credit losses	563,534	$ 573,235
AM Best, A++ Rating [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	20,835
Reinsurance Recoverable, Current	20,835
Reinsurance Recoverable, Past Due	0
AM Best, A+ Rating [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	431,583
Reinsurance Recoverable, Current	428,354
Reinsurance Recoverable, Past Due	3,229
AM Best, A Rating [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	25,915
Reinsurance Recoverable, Current	25,915
Reinsurance Recoverable, Past Due	0
AM Best, A- Rating [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	508
Reinsurance Recoverable, Current	508
Reinsurance Recoverable, Past Due	0
AM Best, B++ Rating [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	410
Reinsurance Recoverable, Current	316
Reinsurance Recoverable, Past Due	94
AM Best, B+ Rating [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	21
Reinsurance Recoverable, Current	21
Reinsurance Recoverable, Past Due	0
AM Best Rated Reinsurer [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	479,272
Reinsurance Recoverable, Current	475,949
Reinsurance Recoverable, Past Due	3,323
Total federal and state pools [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	80,305
Reinsurance Recoverable, Current	80,245
Reinsurance Recoverable, Past Due	60
Other Federal And State Pools [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	5,459
Reinsurance Recoverable, Current	5,459
Reinsurance Recoverable, Past Due	0
Total Non Rated Reinsurer [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverables, Gross	85,764
Reinsurance Recoverable, Current	85,704
Reinsurance Recoverable, Past Due	60
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments, Gross [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverable, Current	561,653
Reinsurance Recoverable, Past Due	3,383
Reinsurance recoverable not past due [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverable, Allowance for Credit Loss	(1,502)
Reinsurance recoverable past due [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverable, Allowance for Credit Loss	0
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments [Member]
Reinsurance Recoverable, Credit Quality Indicator [Line Items]
Reinsurance Recoverable, Current	560,151
Reinsurance Recoverable, Past Due	$ 3,383
[1] See Note 2. "Adoption of Accounting Pronouncements" for additional information regarding our adoption of ASU 2016-13.

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Amount, after valuation allowance, recoverable under reinsurance contracts including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves.

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