Long-Term Debt - Redemption Price, Percentage (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Debt Instrument, Redemption [Line Items]
Loss on Debt Redemption 5 Percent Notes	$ 6,700
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%