Revenue from Contracts with Clients and Customers - Summary of Contract Balances (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Contract Assets
Trade accounts receivable, net	$ 62,462	$ 71,183
Unbilled accounts receivable	1,436	1,079
Costs to fulfill	4,293	4,875
Total contract assets	68,191	77,137
Contract Liabilities
Accrued contract liabilities	1,303	1,806
Deferred revenue	5,805	7,456
Total contract liabilities	$ 7,108	$ 9,262