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Financial Instruments
3 Months Ended
Mar. 31, 2021
Fair Value Disclosures [Abstract]  
Financial Instruments
(9) Financial Instruments 
Fair Value Measurements:
Authoritative guidance on fair value measurements defines fair value, establishes a framework for measuring fair value and stipulates the related disclosure requirements. The Company follows a three-level hierarchy, prioritizing and defining the types of inputs used to measure fair value. The fair values of the Company’s interest rate swaps, natural gas and crude oil price collars and swaps are designated as Level 3. The following fair value hierarchy table presents information about the Company’s assets and liabilities measured at fair value on a recurring basis at March 31, 2021 and December 31, 2020:
 
March 31, 2021
  
Quoted Prices in
Active Markets
For Identical
Assets (Level 1)
   
Significant
Other
Observable
Inputs (Level 2)
   
Significant
Unobservable
Inputs (Level 3)
   
Balance at
March 31,
2021
 
(Thousands of dollars)
                
Assets
                    
Commodity derivative contracts
  $—     $—     $94   $94 
   
 
 
   
 
 
   
 
 
   
 
 
 
Total assets
  $—     $—     $94   $94 
   
 
 
   
 
 
   
 
 
   
 
 
 
Liabilities
                    
Commodity derivative contracts
  $—     $—     $(1,676  $(1,676
   
 
 
   
 
 
   
 
 
   
 
 
 
Total liabilities
  $—     $—     $(1,676  $(1,676
   
 
 
   
 
 
   
 
 
   
 
 
 
     
December 31, 2020
  
Quoted Prices in
Active Markets
For Identical
Assets (Level 1)
   
Significant
Other
Observable
Inputs (Level 2)
   
Significant
Unobservable
Inputs (Level 3)
   
Balance at
December 31,
2020
 
(Thousands of dollars)
                
Assets
                    
Commodity derivative contracts
  $—     $—     $97   $97 
   
 
 
   
 
 
   
 
 
   
 
 
 
Total assets
  $—     $—     $97   $97 
 
March 31, 2021
  
Quoted Prices in
Active Markets
For Identical
Assets (Level 1)
   
Significant
Other
Observable
Inputs (Level 2)
   
Significant
Unobservable
Inputs (Level 3)
   
Balance at
March 31,
2021
 
(Thousands of dollars)
                
Liabilities
                    
Commodity derivative contract
  $—     $—     $(768  $(768
   
 
 
   
 
 
   
 
 
   
 
 
 
Total liabilities
  $—     $—     $(768  $(768
  
 
 
   
 
 
   
 
 
   
 
 
 
The derivative contracts were measured based on quotes from the Company’s counterparties. Such quotes have been derived using valuation models that consider various inputs including current market and contractual prices for the underlying instruments, quoted forward prices for natural gas and crude oil, volatility factors and interest rates, such as a LIBOR curve for a similar length of time as the derivative contract term as applicable. These estimates are verified using comparable NYMEX futures contracts or are compared to multiple quotes obtained from counterparties for reasonableness.
 
The significant unobservable inputs for Level 3 derivative contracts include basis differentials and volatility factors. An increase (decrease) in these unobservable inputs would result in an increase (decrease) in fair value, respectively. The Company does not have access to the specific assumptions used in its counterparties’ valuation models. Consequently, additional disclosures regarding significant Level 3 unobservable inputs were not provided.
The following table sets forth a reconciliation of changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy for the quarter ended March 31, 2021.
 
(Thousands of dollars)
    
Net Liabilities – December 31, 2020
  $(671
Total realized and unrealized (gains) losses:
     
Included in earnings (a)
   (1,145
Purchases, sales, issuances and settlements
   234 
   
 
 
 
Net Liabilities — March 31, 2021
  $(1,582
   
 
 
 
 
(a)
Derivative instruments are reported in revenues as realized gain/loss and on a separately reported line item captioned unrealized gain/loss on derivative instruments.
Derivative Instruments:
The Company is exposed to commodity price and interest rate risk, and management considers periodically the Company’s exposure to cash flow variability resulting from the commodity price changes and interest rate fluctuations. Futures, swaps and options are used to manage the Company’s exposure to commodity price risk inherent in the Company’s oil and gas production operations. The Company does not apply hedge accounting to any of its commodity-based derivatives. Both realized and unrealized gains and losses associated with commodity derivative instruments are recognized in earnings.
The following table sets forth the effect of derivative instruments on the consolidated balance sheets at March 31, 2021 and December 31, 2020:
 
      
Fair Value
 
(Thousands of dollars)
  
Balance Sheet Location
  
March 31,
2021
  
December 31,
2020
 
Asset Derivatives:
            
Derivatives not designated as cash-flow hedging instruments:
            
Natural gas commodity contracts
  Derivative asset short-term  $17  $—   
Natural gas commodity contracts
  Derivative asset long-term and
other assets
   77   97 
      
 
 
  
 
 
 
Total
     $94  $97 
      
 
 
  
 
 
 
Liability Derivatives:
            
Derivatives not designated as cash-flow hedging instruments:
            
Crude oil commodity contracts
  Derivative liability short-term  $(938 $(428
Natural gas commodity contracts
  Derivative liability short-term   (346  (296
Crude oil commodity contracts
  Derivative liability long-term   (385  
 
 
 
Natural gas commodity contracts
  Derivative liability long-term   (7  (44
      
 
 
  
 
 
 
Total
     $(1,676 $(768
      
 
 
  
 
 
 
Total derivative instruments
     $(1,582 $(671
      
 
 
  
 
 
 
 
The following table sets forth the effect of derivative instruments on the consolidated statements of operations for the quarters ended March 31, 2021 and 2020:
 
   
Location of gain/loss recognized in income
  
Amount of gain/loss
recognized in income
 
(Thousands of dollars)
  
2021
  
2020
 
Derivatives not designated as cash-flow hedge instruments:
            
Natural gas commodity contracts
  Unrealized (loss) gain on derivative instruments, net  
$
(15 
$
305 
Crude oil commodity contracts
  Unrealized (loss) gain on derivative instruments, net   (896  6,251 
Natural gas commodity contracts
  Realized (loss)
 
gain on derivative instruments, net
   (60  191 
Crude oil commodity contracts
  Realized (loss) gain on derivative instruments, net   (152  1,006 
      
 
 
  
 
 
 
      $(1,123 $7,753