XML 77 R60.htm IDEA: XBRL DOCUMENT v3.2.0.727
Derivative Activities - Schedule of Realized Gains from Cash Flow Hedges and Other Hedges Reclassified from Accumulated Other Comprehensive Income (Detail) - Reclassification out of Accumulated Other Comprehensive Income - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Derivative Instruments Gain Loss [Line Items]        
Realized Gain (Loss) Reclassified from OCI into Revenue $ 247,510 $ 765,524 $ 710,142 $ 1,222,866
Realized Gain (Loss) Reclassified from OCI into Revenue   3,046   4,286
Tax Effect        
Derivative Instruments Gain Loss [Line Items]        
Realized Gain (Loss) Reclassified from OCI into Revenue   (1,866)   (2,790)
Swaps | Before Tax        
Derivative Instruments Gain Loss [Line Items]        
Realized Gain (Loss) Reclassified from OCI into Revenue   1,052   1,888
Collars | Before Tax        
Derivative Instruments Gain Loss [Line Items]        
Realized Gain (Loss) Reclassified from OCI into Revenue   $ 3,860   $ 5,188