Long-Term Debt Long Term Debt - Redemption Prices (Details) - Senior Notes - 5.625% Senior Notes due 2024	Nov. 15, 2016
2019
Debt Instrument [Line Items]
Debt redemption price percentage of principal amount	104.219%
2020
Debt Instrument [Line Items]
Debt redemption price percentage of principal amount	102.813%
2021
Debt Instrument [Line Items]
Debt redemption price percentage of principal amount	101.406%
2022 and thereafter
Debt Instrument [Line Items]
Debt redemption price percentage of principal amount	100.00%