Investments - Unrealized Loss Position (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Fair Value
Less than 12 Months, Fair Value	$ 108,276
12 Months or more, Fair Value	64,117
Total Fair Value	172,393
Unrealized Losses
Less than 12 Months, Gross Unrealized Loss	(800)
12 Months or more, Gross Unrealized Loss	(795)
Total Unrealized Losses	(1,595)
Asset-backed securities
Fair Value
Less than 12 Months, Fair Value	52,412
12 Months or more, Fair Value	4,656
Total Fair Value	57,068
Unrealized Losses
Less than 12 Months, Gross Unrealized Loss	(229)
12 Months or more, Gross Unrealized Loss	(35)
Total Unrealized Losses	(264)
Corporate notes and bonds
Fair Value
Less than 12 Months, Fair Value	55,864
12 Months or more, Fair Value	54,434
Total Fair Value	110,298
Unrealized Losses
Less than 12 Months, Gross Unrealized Loss	(571)
12 Months or more, Gross Unrealized Loss	(723)
Total Unrealized Losses	(1,294)
Foreign government securities
Fair Value
Less than 12 Months, Fair Value	0
12 Months or more, Fair Value	5,027
Total Fair Value	5,027
Unrealized Losses
Less than 12 Months, Gross Unrealized Loss	0
12 Months or more, Gross Unrealized Loss	(37)
Total Unrealized Losses	$ (37)