Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2015

Accrued Liabilities [Abstract]

Accrued Liabilities [Table Text Block]

Accrued liabilities consisted of the following as of December 31:

	2015		2014
	(In thousands)
Lease operating expenses	$	17,220	$	20,709
Employee costs	12,641		31,451
Interest payable	6,321		6,654
Taxes	3,767		3,284
Third-party credits	3,326		2,825
Other	3,643		5,248
Total accrued liabilities	$	46,918	$	70,171