Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value

	Level 1		Level 2		Level 3		Total
Assets:
Current derivative asset	$	—	$	10,985	$	—	$	10,985
Long-term derivative asset (1)		—		5,715		—		5,715
Total derivative instruments	$	—	$	16,700	$	—	$	16,700
Liabilities:
Current derivative liability	$	—	$	38,483	$	—	$	38,483
Long-term derivative liability (2)		—		6,756		—		6,756
Total derivative instruments	$	—	$	45,239	$	—	$	45,239

⁽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

	March 31, 2019				December 31, 2018
	Principal		Estimated		Principal		Estimated
	repayment obligation		Fair Value		repayment obligation		Fair Value
Credit Facility, secured, due January 2022	$	38,000	$	38,000	$	104,000	$	104,000
Term Loan, secured, due April 2024		975,068		840,996		975,000		858,000
Second Lien Notes, secured, due July 2024		575,149		342,616		545,000		395,125
6.875% Notes, unsecured, due April 2022		150,439		50,021		195,035		68,262
7.125% Notes, unsecured, due April 2025		225,000		49,500		225,000		69,750
Total debt	$	1,963,656	$	1,321,133	$	2,044,035	$	1,495,137