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Segment Data - Sales and Operating Income (Loss) by Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2017 | Mar. 31, 2016 | Jun. 30, 2016
Segment Reporting Information [Line Items] |  |  |  |  |
Assets | $ 2,334,739 |  | $ 2,334,739 |  | $ 2,362,783
External sales: |  |  |  |  |
Total sales | 528,630 | $ 497,837 | 1,493,343 | $ 1,577,212 |
Operating income (loss): |  |  |  |  |
Total operating (income) loss | (57,912) | (27,335) | (72,714) | 200,006 |
Interest expense | 7,331 | 7,113 | 21,475 | 20,895 |
Other expense (income), net | 1,626 | (1,938) | 2,470 | (1,582) |
Income (loss) from continuing operations before income taxes | 48,955 | 22,160 | 48,769 | (219,319) |
Industrial [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Assets | 1,100,690 |  | 1,100,690 |  | 1,019,887
External sales: |  |  |  |  |
Total sales | 289,455 | 274,123 | 825,990 | 812,892 |
Operating income (loss): |  |  |  |  |
Total operating (income) loss | (38,535) | (26,371) | (62,138) | (59,855) |
Infrastructure [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Assets | 791,194 |  | 791,194 |  | 849,447
External sales: |  |  |  |  |
Total sales | 192,878 | 181,465 | 537,167 | 636,624 |
Operating income (loss): |  |  |  |  |
Total operating (income) loss | (19,770) | (3,748) | (22,457) | 242,417 |
WIDIA [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Assets | 191,453 |  | 191,453 |  | 195,339
External sales: |  |  |  |  |
Total sales | 46,297 | 42,249 | 130,186 | 127,696 |
Operating income (loss): |  |  |  |  |
Total operating (income) loss | (606) | 1,679 | 7,797 | 8,053 |
Corporate [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Assets | 251,402 |  | 251,402 |  | $ 298,110
Operating income (loss): |  |  |  |  |
Total operating (income) loss | $ 999 | $ 1,105 | $ 4,084 | $ 9,391 |

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