Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Current Assets Disclosure [Abstract]
Prepaid expenses	$ 68,307	$ 57,017
Sales taxes receivable from customers	5,027	4,588
Other third party receivables	2,418	3,530
Credit card merchant account balance receivable	675	848
Short term portion of capitalized costs to obtain and fulfill contracts	502	646
Accrued interest receivable	206	355
Other	4,294	4,677
Total	$ 81,429	$ 71,661