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Asset Retirement Obligations
 12 Months Ended
Dec. 31, 2019
Asset Retirement Obligation [Abstract]  
Asset Retirement Obligations ASSET RETIREMENT OBLIGATIONS
The Company has asset retirement obligations (AROs) related to environmental disposal obligations associated with cylinders used to supply customers with gas products, and certain restoration obligations associated with its leased facilities.
Changes in the carrying amounts of the Company’s AROs for the years ended December 31, 2019 and 2018 are shown below:
(In thousands)
2019
2018
Balance at beginning of year
$
12,543

$
12,167

Liabilities assumed in acquisitions
1,416

—

Liabilities settled
(102
)
(758
)
Liabilities incurred
546

884

Accretion expense
75

510

Revision of estimate
(538
)
(260
)
Balance at end of year
$
13,940

$
12,543


ARO liabilities expected to be settled within twelve months are included in the consolidated balance sheets in other accrued liabilities, while all other ARO liabilities are included in pension benefit obligations and other liabilities in the consolidated balance sheets.