Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2018

Asset Retirement Obligations

Changes In Asset Retirement Obligation Liability

	(In thousands)
Asset retirement obligations at December 31, 2017	$	69,757
Additional obligations		1,995
Accretion expense		449
Payments		(5,533)
Foreign currency translation adjustments		1,066
Asset retirement obligations at March 31, 2018		67,734
Less: current portion of asset retirement obligations		6,342
Asset retirement obligations, excluding current portion, March 31, 2018	$	61,392