Description of the Business and Summary of Significant Accounting Policies - Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts Payable and Accrued Liabilities [Abstract]
Trade accounts payable	$ 77,620	$ 32,663
Property and other taxes payable	35,947	34,282
Deferred revenues	69,280	51,232
Accrued salaries and benefits	21,544	25,178
Accrued interest payable	16,027	11,179
Other accrued liabilities	54,472	25,115
Total accounts payable and accrued liabilities	$ 274,890	$ 179,649