Summary of Significant Accounting Policies - Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Summary of Significant Accounting Policies
Beginning balance	$ 2,429	$ 4,220
Provision for credit losses	331
Write-offs	(368)	(110)
Total	$ 2,392	$ 4,110