Long-Term Debt And Other Long-Term Liabilities (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Long-Term Debt

Our long-term debt as of the dates indicated consisted of the following:

	September 30, 2018			December 31, 2017
	(In thousands)
Unit credit agreement with an average interest rate of 3.4% at December 31, 2017	$	—		$	178,000
Superior credit agreement	—			—
6.625% senior subordinated notes due 2021	650,000			650,000
Total principal amount	650,000			828,000
Less: unamortized discount	(1,780		)	(2,234		)
Less: debt issuance costs, net	(4,299		)	(5,490		)
Total long-term debt	$	643,921		$	820,276

Other Long-Term Liabilities

Other long-term liabilities consisted of the following:

	September 30, 2018		December 31, 2017
	(In thousands)
Asset retirement obligation (ARO) liability	$	62,727	$	69,444
Workers’ compensation	12,832		13,340
Capital lease obligations	12,355		15,224
Contract liability	10,605		—
Separation benefit plans	8,135		6,524
Deferred compensation plan	5,623		5,390
Gas balancing liability	3,283		3,283
	115,560		113,205
Less current portion	14,150		13,002
Total other long-term liabilities	$	101,410	$	100,203

Capital leases

Future payments required under the capital leases at September 30, 2018 are:

	Amount
Beginning October 1,	(In thousands)
2018	$	6,195
2019	6,195
2020	5,322
Total future payments	17,712
Less payments related to:
Maintenance	4,601
Interest	756
Present value of future minimum payments	$	12,355