Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts Payable and Accrued Liabilities, Current [Abstract]
Trade accounts payable	$ 103,250	$ 69,101
Accrued professional fees	1,152	420
Income taxes payable	13,901	1,598
Share repurchases accrued	8,800	0
Sales taxes payable	2,749	3,615
Other accrued liabilities	369	339
Accounts payable and accrued liabilities	$ 130,221	$ 75,073