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Asset Retirement Obligation (Tables)
 12 Months Ended
Dec. 31, 2019
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Changes in Carrying Amount of Asset Retirement Obligation
Changes in the carrying amounts of the asset retirement obligation associated with the Company’s oil and natural gas properties were as follows:
 
Year Ended December 31,
(Thousands of U.S. Dollars)
2019
 
2018
Balance, beginning of year
$
43,799

 
$
31,564

Liability incurred
7,034

 
6,985

Settlements
(846
)
 
(600
)
Accretion
3,436

 
2,772

Revisions in estimated liability
(10,004
)
 
2,351

Liabilities assumed in acquisitions
—

 
727

Balance, end of year
$
43,419

 
$
43,799

 
 
 
 
Asset retirement obligation - current
$
—

 
$
123

Asset retirement obligation - long-term
43,419

 
43,676

Balance, end of year
$
43,419

 
$
43,799