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Remaining Annual Principal Payments of Credit Obligations (Detail) - USD ($) $ in Thousands | Sep. 30, 2018 | Jun. 30, 2018
--- | --- | ---
Line Of Credit Facility [Line Items] |  |
Year 1 | $ 20,000 |
Year 2 | 26,479 |
Year 3 | 200,000 |
Year 4 | 345,000 |
Total | 591,479 |
Term Loans |  |
Line Of Credit Facility [Line Items] |  |
Year 1 | 20,000 |
Year 2 | 20,000 |
Year 3 | 20,000 |
Total | 60,000 | $ 65,000
Yen Line of Credit |  |
Line Of Credit Facility [Line Items] |  |
Year 2 | 2,645 |
Total | 2,645 | 2,714
U.S. Dollar Line of Credit |  |
Line Of Credit Facility [Line Items] |  |
Year 3 | 180,000 |
Total | 180,000 | $ 80,000
Note Payable |  |
Line Of Credit Facility [Line Items] |  |
Year 2 | 3,834 |
Total | 3,834 |
Convertible Notes |  |
Line Of Credit Facility [Line Items] |  |
Year 4 | 345,000 |
Total | $ 345,000 |

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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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