Fair Value Measurements - Marketable Debt Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	$ 99,601	$ 109,331	$ 117,970
Gross Unrealized Gains	229	5,219	7,043
Gross Unrealized Losses	(4,630)	(154)	(1)
Estimated Fair Value	95,200	114,396	125,012
Other-than-temporary Impairments	0	0	0
Municipal bonds — available-for-sale
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Amortized Cost	99,601	109,331	117,970
Gross Unrealized Gains	229	5,219	7,043
Gross Unrealized Losses	(4,630)	(154)	(1)
Estimated Fair Value	95,200	114,396	125,012
Other-than-temporary Impairments	$ 0	$ 0	$ 0