Accounts Receivable and Allowance for Current Expected Credit Losses - Allowance for Credit Losses on Trade Receivables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at the beginning of the period	$ 2,401	$ 3,460
Current period provision for expected credit losses	819	832
Write-offs	(698)	(1,894)
Recoveries of amounts previously written-off	1	3
Balance at the end of the period	$ 2,523	$ 2,401