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Financial Statement Components - Effects on net income of amounts reclassified from AOCI (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) |  |  |  |
Revenues | $ 975,822 | $ 876,885 | $ 1,945,403 | $ 1,627,558
Costs of revenues | (347,334) | (318,507) | (700,783) | (596,343)
Interest expense | 27,372 | 30,624 | 57,948 | 61,356
Net income (loss) | (134,319) | 238,251 | 146,617 | 416,352
Unrealized Gains (Losses) on Defined Benefit Plans |  |  |  |
Accumulated Other Comprehensive Income (Loss) |  |  |  |
Other comprehensive (income) loss, reclassification adjustment from AOCI, pension and other postretirement benefit plans, net of tax | (400) | (900) | (800) | (1,300)
Reclassification out of accumulated other comprehensive income | Unrealized gains (losses) on cash flow hedges from foreign exchange and interest rate contracts |  |  |  |
Accumulated Other Comprehensive Income (Loss) |  |  |  |
Revenues | 397 | (1,425) | 1,365 | (2,906)
Costs of revenues | 377 | (69) | 1,338 | (156)
Interest expense | 189 | 189 | 378 | 378
Net income (loss) | 963 | (1,305) | 3,081 | (2,684)
Reclassification out of accumulated other comprehensive income | Unrealized gains (losses) on available-for-sale securities |  |  |  |
Accumulated Other Comprehensive Income (Loss) |  |  |  |
Other expense (income), net | $ (69) | $ 30 | $ (63) | $ 234

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