Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid expenses	$ 57,017	$ 51,021
Other third party receivables	3,530	4,785
Sales taxes receivable from customers	4,588	6,499
Credit card merchant account balance receivable	848	796
Short term portion of capitalized costs to obtain and fulfill contracts	646	734
Accrued interest receivable	355	176
Other	4,677	3,063
Total	$ 71,661	$ 67,074