Significant Accounting Policies - Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
After Adoption of ASC 326 [Roll Forward]
Allowance for credit losses, beginning of period	$ 44,892	$ 49,179	$ 48,783	$ 49,773
Additions charged to expense	8,787	9,737	16,004	20,559
Write-offs, net of recoveries	(10,172)	(9,325)	(21,280)	(20,741)
Allowance for credit losses, end of period	$ 43,507	$ 49,591	$ 43,507	$ 49,591