Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Redemption Price, Percentage (Details)

v3.10.0.1
Long-Term Debt - Redemption Price, Percentage (Details)
12 Months Ended
Dec. 31, 2018
5.0% Senior Subordinated Notes due 2023 | Beginning on May 15, 2018  
Debt Instrument, Redemption [Line Items]  
Redemption Price 102.50%
5.0% Senior Subordinated Notes due 2023 | Beginning on May 15, 2019  
Debt Instrument, Redemption [Line Items]  
Redemption Price 101.667%
5.0% Senior Subordinated Notes due 2023 | Beginning on May 15, 2020  
Debt Instrument, Redemption [Line Items]  
Redemption Price 100.833%
5.0% Senior Subordinated Notes due 2023 | Beginning on May 15, 2021 and thereafter  
Debt Instrument, Redemption [Line Items]  
Redemption Price 100.00%
6.125% Notes  
Debt Instrument, Redemption [Line Items]  
Redemption Price 106.125%
6.125% Notes | Beginning on March 15, 2022  
Debt Instrument, Redemption [Line Items]  
Redemption Price 103.063%
6.125% Notes | Beginning on March 15, 2023  
Debt Instrument, Redemption [Line Items]  
Redemption Price 102.042%
6.125% Notes | Beginning on March 15, 2024  
Debt Instrument, Redemption [Line Items]  
Redemption Price 101.021%
6.125% Notes | Beginning on March 15, 2025 and thereafter  
Debt Instrument, Redemption [Line Items]  
Redemption Price 100.00%