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

12 Months Ended

Dec. 31, 2019

Long-term debt and other long-term liabilites [Abstract]

Long Term Debt [Table Text Block]

Long-term debt consisted of the following as of December 31:

	2019		2018
	(In thousands)
Current portion of long-term debt:
Unit credit agreement with an average interest rate of 4.0% at December 31, 2019	$	108,200	$	—
Long-term debt:
Superior credit agreement with an average interest rate of 3.9% at December 31, 2019	16,500		—
6.625% senior subordinated notes due 2021	650,000		650,000
Total principal amount	$	666,500	$	650,000
Less: unamortized discount	(971)		(1,623)
Less: debt issuance costs, net	(2,313)		(3,902)
Total long-term debt	$	663,216	$	644,475

Other Long Term Liabilities [Table Text Block]

Other long-term liabilities consisted of the following as of December 31:

	2019		2018
	(In thousands)
ARO liability	$	66,627	$	64,208
Workers’ compensation	11,510		12,738
Finance lease obligations	7,379		11,380
Contract liability	7,061		9,881
Separation benefit plans	10,122		8,814
Deferred compensation plan	6,180		5,132
Gas balancing liability	3,838		3,331
	112,717		115,484
Less current portion	17,376		14,250
Total other long-term liabilities	$	95,341	$	101,234