Long-Term Debt - Schedule of Redemption Prices of Notes (Details)	12 Months Ended
	Dec. 31, 2016
Year Beginning August 1, 2018
Long-term debt
Redemption price (as a percent)	105.25%
Year Beginning August 1, 2019
Long-term debt
Redemption price (as a percent)	103.50%
Year Beginning August 1, 2020
Long-term debt
Redemption price (as a percent)	101.75%
Year Beginning August 1, 2021 and Thereafter
Long-term debt
Redemption price (as a percent)	100.00%