Asset Retirement Obligations (Tables)

6 Months Ended

Jun. 30, 2019

Asset Retirement Obligation Disclosure [Abstract]

Summary of changes in asset retirement obligations

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

(in thousands)	Amount
Balance at January 1, 2019	$	11,572
Revisions in estimated cash flows	20
Accretion expense	645
Balance at June 30, 2019	$	12,237