Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other Current Assets Disclosure [Abstract]
Prepaid expenses	$ 52,918	$ 51,021
Sales taxes receivable from customers	7,588	6,499
Other third party receivables	3,422	4,785
Credit card merchant account balance receivable	1,251	796
Short term portion of capitalized costs to obtain and fulfill contracts	664	734
Accrued interest receivable	352	176
Other	3,722	3,063
Total	$ 69,917	$ 67,074