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Description of the Business and Summary of Significant Accounting Policies - Accounts Payable and Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Accounts Payable and Accrued Liabilities [Abstract]    
Trade accounts payable $ 23,125 $ 40,238
Property and other taxes payable 51,821 57,668
Deferred revenues 70,441 76,744
Accrued salaries and benefits 20,598 35,303
Accrued interest payable 14,263 16,520
Other accrued liabilities 22,873 38,442
Total accounts payable and accrued liabilities $ 203,121 $ 264,915