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

12 Months Ended

Dec. 31, 2015

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:

	2015		2014
	(In thousands)
Credit agreement with an average interest rates of 2.6% and 2.9% at December 31, 2015 and 2014, respectively	$	281,000	$	166,000
6.625% senior subordinated notes due 2021, net of unamortized discount of $3.3 million and $3.8 million at December 31, 2015 and 2014, respectively	646,662		646,163
Total long-term debt	$	927,662	$	812,163

Other Long Term Liabilities [Table Text Block]

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

	2015		2014
	(In thousands)
ARO liability	$	98,297	$	100,567
Capital lease obligations	22,466		25,876
Workers’ compensation	16,551		17,997
Separation benefit plans	9,886		11,276
Gas balancing liability	5,047		3,623
Deferred compensation plan	4,244		4,055
Other	410		410
	156,901		163,804
Less current portion	16,560		15,019
Total other long-term liabilities	$	140,341	$	148,785

Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]

Future payments required under the capital leases at December 31, 2015 are as follows:

	Amount
Ending December 31,	(In thousands)
2016	$	6,168
2017	6,168
2018	6,168
2019	6,168
2020	6,168
2021	3,769
Total future payments	34,609
Less payments related to:
Maintenance	9,445
Interest	2,698
Present value of future minimum payments	$	22,466