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

12 Months Ended

Dec. 31, 2014

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:

	2014		2013
	(In thousands)
Credit agreement with an average interest rates of 2.9% at December 31, 2014	$	166,000	$	—
6.625% senior subordinated notes due 2021, net of unamortized discount of $3.8 million and $4.3 million at December 31, 2014 and 2013, respectively	646,163		645,696
Total long-term debt	$	812,163	$	645,696

Other Long Term Liabilities [Table Text Block]

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

	2014		2013
	(In thousands)
ARO liability	$	100,567	$	133,657
Capital lease obligations	25,876		—
Workers’ compensation	17,997		20,041
Separation benefit plans	11,276		9,382
Gas balancing liability	3,623		3,775
Deferred compensation plan	4,055		3,589
Other	410		—
	163,804		170,444
Less current portion	15,019		12,113
Total other long-term liabilities	$	148,785	$	158,331

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

Future payments required under the capital leases at December 31, 2014 are as follows:

	Amount
Ending December 31,	(In thousands)
2015	$	6,195
2016	6,195
2017	6,195
2018	6,195
2019	6,195
2020 and thereafter	9,967
Total future payments	40,942
Less payments related to:
Maintenance	11,395
Interest	3,671
Present value of future minimum payments	$	25,876