Other Accrued Expenses Other Accrued Expenses (Tables)

3 Months Ended

Mar. 31, 2019

Other Accrued Expense, Current [Abstract]

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

The following table presents the components of other accrued expenses as of:

	March 31, 2019		December 31, 2018
	(in thousands)
Employee benefits	$	10,188	$	25,811
Asset retirement obligations	28,798		25,598
Environmental expenses	3,554		3,038
Operating and finance leases	6,645		—
Other	19,651		20,686
Other accrued expenses	$	68,836	$	75,133

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

	March 31, 2019		December 31, 2018
	(in thousands)
Production taxes	$	78,805	$	61,310
Deferred oil gathering credit	22,207		22,710
Operating and finance leases	20,063		—
Other	3,988		8,644
Other liabilities	$	125,063	$	92,664