Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2017

Asset Retirement Obligations

Changes In Asset Retirement Obligation Liability

	(In thousands)
Asset retirement obligations as of January 1, 2017	$	54,907
Additional obligations		2,792
Estimated obligations assumed in acquisitions		6,083
Accretion expense		540
Payments		(1,884)
Foreign currency translation adjustments		277
Asset retirement obligations as of March 31, 2017		62,715
Less: current portion of asset retirement obligations		9,452
Asset retirement obligations, excluding current portion, as of March 31, 2017	$	53,263