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Environmental Matters (Tables)
12 Months Ended
Dec. 31, 2021
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Rollforward of Our Environmental Liabilities

The table below presents a rollforward of our environmental liabilities (in thousands):

 

 

 

2021

 

 

2020

 

Balance at beginning of year

 

$

3,914

 

 

$

3,390

 

Provision for new environmental losses

 

 

2,996

 

 

 

210

 

Changes in estimates for previously incurred losses

 

 

6

 

 

 

1,403

 

Payments

 

 

(1,540

)

 

 

(1,089

)

Balance at end of year

 

 

5,376

 

 

 

3,914

 

Current portion, included within accrued expenses and other current liabilities

 

 

2,419

 

 

 

1,710

 

Long-term portion, included within other long-term liabilities

 

$

2,957

 

 

$

2,204