Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value

	Level 1		Level 2		Level 3		Total
Assets:
Current derivative asset	$	—	$	12,728	$	—	$	12,728
Long-term derivative asset (1)		—		1,454		—		1,454
Total derivative instruments	$	—	$	14,182	$	—	$	14,182
Liabilities:
Current derivative liability	$	—	$	61,926	$	—	$	61,926
Long-term derivative liability (2)		—		7,847		—		7,847
Total derivative instruments	$	—	$	69,773	$	—	$	69,773

⁽¹⁾ Included in Other assets in the Condensed Consolidated Balance Sheet.

⁽²⁾ Included in Other long-term obligations in the Condensed Consolidated Balance Sheet.

Carrying Values and Estimated Fair Values of Financial Instruments

	September 30, 2018				December 31, 2017
	Carrying		Estimated		Carrying		Estimated
	Amount		Fair Value		Amount		Fair Value
Term loan, secured, due April 2024	$	975,000	$	877,500	$	975,000	$	975,000
6.875% Notes, unsecured, due April 2022, issued 2017		700,000		336,000		700,000		701,750
7.125% Notes, unsecured, due April 2025, issued 2017		500,000		209,210		500,000		505,000
Total debt	$	2,175,000	$	1,422,710	$	2,175,000	$	2,181,750