Summary of Significant Accounting Policies - Contract Balances (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Changes in the Company's contract assets and contract liabilities
Contract asset, Beginning balance		$ 3,000
Contract asset, Additions		0
Contract asset, Deductions		3,000
Contract liabilities:
Contract liabilities (deferred revenue), Beginning balance	$ 50,211	92,068
Contract liabilities (deferred revenue), Additions	23,227	5,704
Contract liabilities (deferred revenue), Deductions	(9,534)	(43,961)
Contract liabilities (deferred revenue), Ending balance	$ 63,904	$ 53,811