Credit Losses - Summary of Allowance for Credit Losses on Accounts Receivables (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Receivables [Abstract]
Balance at beginning of period	$ (13,994)	$ (12,676)
Provision for expected credit losses	(139)	(1,003)
Write-offs/recoveries	1,209	2,103
Balance at end of period	$ (12,924)	$ (11,576)