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Financial Statement Components - Effects on net income (loss) of amounts reclassified from AOCI (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |
Revenues |  | $ 1,097,311 | $ 1,021,294 | $ 3,310,469 | $ 2,966,697
Costs of revenues |  | 486,945 | 368,356 | 1,276,592 | 1,068,475
Interest expense |  | 31,187 | 28,119 | 84,087 | 86,067
Other expense (income), net |  | (9,282) | (7,640) | (28,535) | (19,847)
Net income attributable to KLA-Tencor |  | 192,728 | 306,881 | 957,772 | 453,498
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 |  | 200 | 400 | 600 | 1,200
Reclassification out of accumulated other comprehensive income | Unrealized gains (losses) on cash flow hedges from foreign exchange and interest rate contracts(1) |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |
Revenues | [1] | 655 | (65) | 3,343 | 1,300
Costs of revenues |  | (17) | 570 | (309) | 1,908
Interest expense |  | 150 | 189 | 527 | 567
Other expense (income), net |  | 158 | 0 | 158 | 0
Net income attributable to KLA-Tencor |  | 946 | 694 | 3,719 | 3,775
Reclassification out of accumulated other comprehensive income | Unrealized gains (losses) on available-for-sale securities |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |
Other expense (income), net |  | $ (313) | $ 2 | $ (1,263) | $ (61)
[1] | Reflects the adoption of the new accounting guidance for hedge accounting in the second quarter of fiscal year 2019. For additional details, refer to Note 15, “Derivative Instruments and Hedging Activities.”

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