Summary of Significant Accounting Policies - Allowance for credit losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Allowance for credit loss roll forward
Balance at beginning of period	$ 3,011	$ 4,005	$ 3,749	$ 3,977
Charged to selling, general and administrative expense	25	56	922	100
Write-offs	(644)	(395)	(2,279)	(411)
Total	$ 2,392	$ 3,666	$ 2,392	$ 3,666