Other Accrued Expenses Other Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2018

Other Liabilities Disclosure [Abstract]

Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Noncurrent [Text Block]

The following table presents the components of other liabilities as of:

	June 30, 2018		December 31, 2017
	(in thousands)
Production taxes	$	28,537	$	50,476
Deferred oil gathering credit	23,115		—
Other	9,965		6,857
Other liabilities	$	61,617	$	57,333