XML 71 R41.htm IDEA: XBRL DOCUMENT v2.4.0.8
Derivative Instruments - Schedule of Outstanding Commodity Derivative Instruments (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Derivative [Line Items]  
Fair Value Asset (Liability) $ 40,296
2014 Two-Way Collars [Member]
  
Derivative [Line Items]  
Total Notional Amount of Oil (Barrels) 1,088,000
Average Floor Price (in dollars per barrel) 95.07
Average Ceiling Price (in dollars per barrel) 106.42
Fair Value Asset (Liability) 4,893
2014 Three-Way Collars [Member]
  
Derivative [Line Items]  
Total Notional Amount of Oil (Barrels) 842,000
Average Sub-Floor Price (in dollars per barrel) 70.55
Average Floor Price (in dollars per barrel) 90.55
Average Ceiling Price (in dollars per barrel) 105.16
Fair Value Asset (Liability) 1,066
2014 Swaps [Member]
  
Derivative [Line Items]  
Total Notional Amount of Oil (Barrels) 994,000
Average Swap Price (in dollars per barrel) 96.32
Fair Value Asset (Liability) 3,942
2014 Swaps with sub-floors [Member]
  
Derivative [Line Items]  
Total Notional Amount of Oil (Barrels) 552,000
Average Swap Price (in dollars per barrel) 92.60
Average Sub-Floor Price (in dollars per barrel) 70.00
Fair Value Asset (Liability) 690
2015 Two-Way Collars [Member]
  
Derivative [Line Items]  
Total Notional Amount of Oil (Barrels) 2,388,500
Average Floor Price (in dollars per barrel) 87.98
Average Ceiling Price (in dollars per barrel) 103.21
Fair Value Asset (Liability) 9,574
2015 Three-Way Collars [Member]
  
Derivative [Line Items]  
Total Notional Amount of Oil (Barrels) 263,500
Average Sub-Floor Price (in dollars per barrel) 70.59
Average Floor Price (in dollars per barrel) 90.59
Average Ceiling Price (in dollars per barrel) 105.25
Fair Value Asset (Liability) 869
2015 Swaps [Member]
  
Derivative [Line Items]  
Total Notional Amount of Oil (Barrels) 5,263,500
Average Swap Price (in dollars per barrel) 90.81
Fair Value Asset (Liability) 14,093
2015 Swaps with sub-floors [Member]
  
Derivative [Line Items]  
Total Notional Amount of Oil (Barrels) 186,000
Average Swap Price (in dollars per barrel) 92.60
Average Sub-Floor Price (in dollars per barrel) 70.00
Fair Value Asset (Liability) 538
2015 Deferred Premium Puts [Member]
  
Derivative [Line Items]  
Total Notional Amount of Oil (Barrels) 1,086,000
Average Floor Price (in dollars per barrel) 90.00
Average deferred premium (in dollars per barrel) 2.55
Fair Value Asset (Liability) 2,919
2016 Two Way Collars [Member]
  
Derivative [Line Items]  
Total Notional Amount of Oil (Barrels) 155,000
Average Floor Price (in dollars per barrel) 86.00
Average Ceiling Price (in dollars per barrel) 103.42
Fair Value Asset (Liability) 692
2016 Swaps [Member]
  
Derivative [Line Items]  
Total Notional Amount of Oil (Barrels) 310,000
Average Swap Price (in dollars per barrel) 90.15
Fair Value Asset (Liability) $ 1,020