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Asset Retirement Obligation (Tables)
 12 Months Ended
Dec. 31, 2021
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Changes in Asset Retirement Obligation

The following summarizes the changes in the Company’s asset retirement obligation for the years ended December 31:

 

 

 

 

 

 

 

 

($ in thousands)

 

2021

 

 

2020

 

Asset retirement obligation, beginning balance

 

$

6,409

 

 

$

6,309

 

Liabilities incurred (a)

 

 

5,210

 

 

 

133

 

Accretion expense

 

 

308

 

 

 

259

 

Liabilities settled

 

 

(103

)

 

 

(292

)

Asset retirement obligation, ending balance

 

$

11,824

 

 

$

6,409

 

 

(a) This includes $3.9 million of asset retirement obligations assumed as part of the Redflex acquisition, and a $1.2 million increase resulting from a change in estimate for the impact of inflation.