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Consolidated Statements Of Comprehensive Income (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Net income $ 146,260 $ 153,640 $ 388,814 $ 266,607
Other comprehensive income:        
Net loss on cash flow hedges(1) 0 [1] 0 [1] (3,613) [1] (4,560) [1]
Reclassification of net loss (gain) on cash flow hedges to income(1) (153) [1] (41) [1] (179) [1] 4,326 [1]
Amortization of prior service credit(2) (928) [2] (851) [2] (1,823) [2] (1,702) [2]
Amortization of actuarial loss(2) 1,192 [2] 1,354 [2] 2,016 [2] 2,684 [2]
Settlement cost(2) 1,569 [2] 0 [2] 1,569 [2] 0 [2]
Total other comprehensive income (loss) 1,680 462 (2,030) 748
Comprehensive income $ 147,940 $ 154,102 $ 386,784 $ 267,355
[1] See Note 9–Derivative Financial Instruments for details of the amount of gain/loss recognized in accumulated other comprehensive loss ("AOCL") on derivatives and the amount of gain/loss reclassified from AOCL into income.
[2] These AOCL components are included in the computation of net periodic pension cost (see Note 7–Employee Benefit Plans).