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Schedule of Long-Term Obligations (Parenthetical) (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 10, 2020
Dec. 31, 2019
Dec. 31, 2018
Debt Instrument      
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months   $ 326,648  
Finance Lease, Weighted Average Discount Rate, Percent   4.10% 4.50%
Debt Issuance Costs, Gross   $ 30,000  
Long-term Debt, Maturities, Repayments of Principal in Year Two   133,951  
Long-term Debt, Maturities, Repayments of Principal in Year Five   2,427,714  
US Notes (2023) [Member]      
Debt Instrument      
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months   185,000  
Debt Instrument, Redemption Price, Percentage 101.583%    
Long-term Debt, Maturities, Repayments of Principal in Year Two   105,000  
Long-term Debt, Maturities, Repayments of Principal in Year Five   $ 310,000  
Senior Notes 2024 [Member]      
Debt Instrument      
Debt Instrument, Redemption Price, Percentage   100.00%  
Notes payable      
Debt Instrument      
Debt, Weighted Average Interest Rate   3.20% 2.00%
Other Long Term Debt      
Debt Instrument      
Debt, Weighted Average Interest Rate   1.80% 1.80%