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Statements of Comprehensive Income - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Net income $ 86,594 $ 61,393 $ 151,792 $ 117,902
Other comprehensive income adjustments:        
Net unrealized gains (losses) on available-for-sale securities 7 (158) (19) (14)
Pension and postretirement benefits 511 709 853 1,181
Total other comprehensive income adjustments 518 551 834 1,167
Comprehensive income $ 87,112 $ 61,944 $ 152,626 $ 119,069