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Accumulated Other Comprehensive Income Reclassification Out Of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net realized gain (loss) on investments	$ 268	$ 186	$ 771	$ 327
Other-than-temporary impairment loss, debt securities, available-for-sale, recognized in earnings			0	482
Income (loss) before income taxes	18,437	18,857	61,040	28,250
Tax	(3,934)	(3,556)	(12,932)	(5,465)
Net income	14,503	15,301	48,108	22,785
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	(9)	0	15	(348)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains and Losses on Available-For-Sale Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net realized gain (loss) on investments	(11)	0	19	30
Other-than-temporary impairment loss, debt securities, available-for-sale, recognized in earnings	0	0	0	(482)
Income (loss) before income taxes	(11)	0	19	(452)
Tax	2	0	(4)	104
Net income	$ (9)	$ 0	$ 15	$ (348)

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