XML 58 R77.htm IDEA: XBRL DOCUMENT v2.4.0.8
Fair Value Measurements - Reconciliation of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis using Significant Unobservable Inputs (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation      
Beginning balance of Level 3 $ (512) $ (4,252) $ (222,554)
Gain (loss) on derivative contracts (133) (5,460) 40,907
Purchases   5,697  
Cash paid on settlements 645 3,503 60,127
Transfers(1)     117,268 [1]
Ending balance of Level 3 0 (512) (4,252)
Commodity derivatives contracts
      
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation      
Beginning balance of Level 3 (512) (4,252) (205,860)
Gain (loss) on derivative contracts (133) (5,460) 44,075
Purchases   5,697  
Cash paid on settlements 645 3,503 50,713
Transfers(1)     106,820 [1]
Ending balance of Level 3 0 (512) (4,252)
Interest rate swaps
      
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation      
Beginning balance of Level 3 0 0 (16,694)
Gain (loss) on derivative contracts 0 0 (3,168)
Purchases   0  
Cash paid on settlements 0 0 9,414
Transfers(1)     10,448 [1]
Ending balance of Level 3 $ 0 $ 0 $ 0
[1] Fair values related to the Company’s oil and natural gas fixed price swaps, natural gas collars and interest rate swap were transferred from Level 3 to Level 2 in the fourth quarter of 2011 due to enhancements to the Company’s internal valuation process, including the use of observable inputs to assess the fair value. During the years ended December 31, 2013 and 2012, the Company did not have any transfers between Level 1, Level 2 or Level 3 fair value measurements.