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FAIR VALUE MEASUREMENTS
9 Months Ended
Sep. 30, 2014
Fair Value Disclosures [Abstract]  
FAIR VALUE MEASUREMENTS
2.           FAIR VALUE MEASUREMENTS
 
We account for certain assets and liabilities at fair value. The hierarchy below lists three levels of fair value based on the extent to which inputs used in measuring fair value are observable in the market. We categorize each of our fair value measurements in one of these three levels based on the lowest level input that is significant to the fair value measurement in its entirety. These levels are:
 
 
Level 1: Quoted prices in active markets for identical assets or liabilities;
 
Level 2: Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and
 
Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.
 
Assets and liabilities measured at fair value on a recurring basis are summarized as follows (in thousands):
                                 
   
Level 1
   
Level 2
   
Level 3
   
Total
 
September 30, 2014:
                       
Interest rate swap (note 4)
  $     $ 715     $     $ 715  
Asset retirement obligations(1)
                3,770       3,770  
                                 
December 31, 2013:
                               
Money market funds(2)
  $ 5,006     $     $     $ 5,006  
Interest rate swap (note 4)
          777             777  
Asset retirement obligations(1)
                2,357       2,357  
 
 
(1)
We calculate the fair value of asset retirement obligations by discounting the estimated amount using the current Treasury bill rate adjusted for our credit non-performance. We include current asset retirement obligations of $1.3 million and $1.4 million in “Other current liabilities” in the consolidated balance sheets for September 30, 2014 and December 31, 2013, respectively.  We include long-term asset retirement obligations of $2.5 million and $1.0 million in “Other long-term liabilities” in the consolidated balance sheets for September 30, 2014 and December 31, 2013, respectively.
 
(2)
Included in “Cash and cash equivalents” in the consolidated balance sheet as of December 31, 2013. Unrealized gains and losses on money market funds were nominal due to the short-term nature of the investments.
 
The following table provides a summary of changes in our Level 3 asset retirement obligations for the nine months ended September 30, 2014 (in thousands):
           
 
Balance, January 1, 2014
 
$
2,357
 
 
Accrued estimated obligation, less fair value adjustment (note 5)
   
1,338
 
 
Accretion
   
165
 
 
Payments
   
(90
)
 
Balance, September 30, 2014
 
$
3,770
 
 
The fair values of our other Level 3 liabilities, estimated using a discount cash flow analysis based on incremental borrowing rates for similar types of borrowing arrangements, are as follows (in thousands):
                                 
    September 30, 2014     December 31, 2013  
   
Carrying
Amount
   
Fair
Value
   
Carrying
Amount
   
Fair
Value
 
Term loan
  $ 297,750     $ 291,676     $ 300,000     $ 293,125  
Revolving credit facility
    5,000       4,731