Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Other Current Assets Disclosure [Abstract]
Prepaid Expense, Current	$ 47,947	$ 51,021
Sales taxes receivable from customers	7,977	6,499
Financing Receivable, before Allowance for Credit Loss, Current	3,891	4,785
Interest Receivable, Current	291	176
Credit and Debit Card Receivables, at Carrying Value	815	796
Capitalized Contract Costs, net, Current	681	734
Other Receivables	2,278	3,063
Other current assets	$ 63,880	$ 67,074