Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Other Current Assets Disclosure [Abstract]
Prepaid Expense, Current	$ 53,239	$ 51,021
Sales taxes receivable from customers	7,701	6,499
Financing Receivable, before Allowance for Credit Loss, Current	4,578	4,785
Interest Receivable, Current	292	176
Credit and Debit Card Receivables, at Carrying Value	800	796
Capitalized Contract Costs, net, Current	710	734
Other Receivables	1,347	3,063
Other current assets	$ 68,667	$ 67,074