XML 61 R40.htm IDEA: XBRL DOCUMENT v3.21.1
Accrued Closure Costs and ARO (Tables)
 12 Months Ended
Dec. 31, 2020
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Change in Asset Retirement Obligation

Changes to reported closure liabilities (current and long-term) for the years ended December 31, 2020 and 2019, were as follows:

 

Amounts in thousands      
Balance as of December 31, 2018     6,750  
Accretion expense     320  
Spending     (1,359 )
Adjustment to closure liability     330  
Balance as of December 31, 2019   $ 6,041  
Accretion expense     335  
Spending     (11 )
Balance as of December 31, 2020   $ 6,365  
Schedule of Asset Retirement Obligations

The reported closure asset or ARO, is reported as a component of “Net Property and equipment” in the Consolidated Balance Sheets at December 31, 2020 and 2019 with the following activity for the years ended December 31, 2020 and 2019:

 

Amounts in thousands      
Balance as of December 31, 2018     3,730  
Amortization of closure and post-closure asset     (191 )
Balance as of December 31, 2019   $ 3,539  
Amortization of closure and post-closure asset     (191 )
Balance as of December 31, 2020   $ 3,348