The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Name:	us-gaap_RetainedEarningsAccumulatedDeficit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Retained earnings	$ 674,349		$ 661,553
Fixed maturity securities, allowance for expected credit losses	$ 2,471	$ 2,510
Revision of Prior Period, Change in Accounting Principle, Adjustment \| Accounting Standards Update 2016-02
Retained earnings				$ 35,984
Revision of Prior Period, Change in Accounting Principle, Adjustment \| Accounting Standards Update 2017-08
Retained earnings				$ 2,373