STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
|
| Comprehensive income: | ||||
| Net income | $ 67,781 | $ 68,346 | $ 128,198 | $ 123,080 |
| Pension and retiree medical benefits: | ||||
| Amortization of losses included in net periodic benefit cost, net of tax of $9, $6, $27 and $19, respectively | 16 | 12 | 46 | 35 |
| Derivative instruments: | ||||
| Reclassification of losses to net income, net of tax of $6, $25, $18 and $74, respectively | 10 | 44 | 29 | 129 |
| Other comprehensive income | 26 | 56 | 75 | 164 |
| Comprehensive income | $ 67,807 | $ 68,402 | $ 128,273 | $ 123,244 |