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Asset Retirement Obligations, Contractual Third-Party Reclamation Receivables, and Reclamation Deposits
6 Months Ended
Jun. 30, 2011
Asset Retirement Obligations, Contractual Third-Party Reclamation Receivables, and Reclamation Deposits [Abstract]  
ASSET RETIREMENT OBLIGATIONS, CONTRACTUAL THIRD-PARTY RECLAMATION RECEIVABLES, AND RECLAMATION DEPOSITS
8.   ASSET RETIREMENT OBLIGATIONS, CONTRACTUAL THIRD-PARTY RECLAMATION RECEIVABLES, AND RECLAMATION DEPOSITS
The asset retirement obligations, contractual third-party reclamation receivables, and reclamation deposits for each of the Company’s mines and ROVA at June 30, 2011 are summarized below:
                         
            Contractual Third-        
    Asset Retirement     Party Reclamation     Reclamation  
    Obligations     Receivables     Deposits  
    (In thousands)  
Rosebud
  $ 107,608     $ 15,034     $ 71,997  
Jewett
    80,692       80,692       —  
Absaloka
    33,150       527       —  
Beulah
    18,543       —       —  
Savage
    2,789       —       —  
ROVA
    742       —       —  
 
                 
Total
  $ 243,524     $ 96,253     $ 71,997  
 
                 
Asset Retirement Obligations
Changes in the Company’s asset retirement obligations are as follows:
                 
    Six Months Ended  
    June 30,  
    2011     2010  
    (In thousands)  
Asset retirement obligations, beginning of period
  $ 241,643     $ 244,614  
Accretion
    10,039       9,584  
Liabilities settled
    (8,158 )     (6,628 )
 
           
Asset retirement obligations, end of period
    243,524       247,570  
Less current portion
    (15,956 )     (16,201 )
 
           
Asset retirement obligations, less current portion
  $ 227,568     $ 231,369  
 
           
Contractual Third-Party Reclamation Receivables
The Company has recognized an asset of $96.3 million as contractual third-party reclamation receivables, representing the present value of customer obligations to reimburse the Company for reclamation expenditures at the Company’s Rosebud, Jewett and Absaloka Mines.
    Reclamation Deposits
The Company’s reclamation deposits will be used to fund final reclamation activities. The Company’s carrying value and estimated fair value of its reclamation deposits at June 30, 2011 are as follows:
                 
    Carrying Value     Fair Value  
    (In thousands)  
Cash and cash equivalents
  $ 36,353     $ 36,353  
Held-to-maturity securities
    18,624       20,097  
Time deposits
    15,903       15,903  
Available-for-sale securities
    1,117       1,117  
 
           
 
  $ 71,997     $ 73,470  
 
           
The Company recorded a gain of $0.1 million on the sale of available-for-sale securities held as reclamation deposits in the six months ended June 30, 2011.
Held-to-maturity and Available-for-sale Reclamation Deposits
The amortized cost, gross unrealized holding gains and losses and fair value of held-to-maturity securities at June 30, 2011 are as follows (in thousands):
         
Amortized cost
  $ 18,624  
Gross unrealized holding gains
    1,493  
Gross unrealized holding losses
    (20 )
 
     
Fair value
  $ 20,097  
 
     
Maturities of held-to-maturity securities at June 30, 2011 are as follows:
                 
    Amortized Cost     Fair Value  
    (In thousands)  
Due in five years or less
  $ 7,092     $ 7,256  
Due after five years to ten years
    5,004       5,442  
Due in more than ten years
    6,528       7,399  
 
           
 
  $ 18,624     $ 20,097  
 
           
The cost basis, gross unrealized holding gains and fair value of available-for-sale securities at June 30, 2011 are as follows (in thousands):
         
Cost basis
  $ 1,000  
Gross unrealized holding gains
    117  
 
     
Fair value
  $ 1,117