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Accumulated Other Comprehensive Income Reclassification Out Of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net realized gain (loss) on investments	$ 321	$ (412)
Income (loss) before income taxes	17,315	(8,529)
Tax	(3,492)	1,518
Net income (loss)	13,823	(7,011)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	18	(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	23	30
Other-than-temporary impairments	0	(482)
Income (loss) before income taxes	23	(452)
Tax	(5)	104
Net income (loss)	$ 18	$ (348)

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