Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2017

Asset Retirement Obligation Disclosure [Abstract]

Summary of Changes to Asset Retirement Obligation

A summary of the changes to our ARO is as follows (in thousands):  

Balance, December 31, 2016	$	334,438
Liabilities settled		(14,499	)
Accretion of discount		4,201
Revisions of estimated liabilities (1)		2,660
Balance, March 31, 2017		326,800
Less current portion		66,150
Long-term	$	260,650

(1) Revisions were primarily related to changes in scope of work at both our West Cameron fields and Eugene Island fields.