Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2019

Asset Retirement Obligation Disclosure [Abstract]

Summary of asset retirement obligations

The following table provides a summary of the changes in the Company’s asset retirement obligations:

(in thousands)	Amount
Balance, January 1, 2019	$	11,572
Revisions in estimated cash flows	20
Accretion expense	1,291
Balance, December 31, 2019	$	12,883