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Other Comprehensive Income (Loss) - Summary of Unrealized Gains and Losses on Available-for-Sale Securities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period			$ 223,726	$ 212,508
Other comprehensive gain (loss)	$ 362	$ (2,176)	(950)	(2,805)
Balance at end of period	234,155	216,584	234,155	216,584
Accumulated Net Investment Gain (Loss) Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	1,556	7,890	5,009	3,657
Unrealized gains (losses) arising during the period	(417)	(572)	(4,670)	5,537
Reclassification of net realized gains during the period	(45)	(427)	(164)	(1,179)
Related deferred taxes	96	209	1,015	(915)
Other comprehensive gain (loss)	(366)	(790)	(3,819)	3,443
Balance at end of period	$ 1,190	$ 7,100	$ 1,190	$ 7,100

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