Significant Accounting Policies - Comprehensive Income (Loss) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Accumulated other comprehensive loss	$ (34,247,000)	$ (35,068,000)	$ 9,200,000
Tax from unrealized gains and losses on marketable securities	100,000	100,000	200,000
Reclassifications from AOCI	$ 0	$ 0	$ 0