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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Total debt, payments due by period |  |  |
Total debt | $ 404,272 |  |
Less than 1 year | 115,262 |  |
1-3 years | 1,446 |  |
3-5 years | 287,564 |  |
Operating leases, payments due by period |  |  |
Operating leases | 21,887 |  |
Less than 1 year | 6,858 |  |
1-3 years | 9,471 |  |
3-5 years | 4,605 |  |
After 5 years | 953 |  |
Purchase obligations, payments due by period |  |  |
Purchase obligations | 66,850 |  |
Less than 1 year | 66,229 |  |
1-3 years | 603 |  |
3-5 years | 18 |  |
Acquisition-related obligations, payments due by period |  |  |
Acquisition-related obligations | 15,816 |  |
Less than 1 year | 5,206 |  |
1-3 years | 8,449 |  |
3-5 years | 1,201 |  |
After 5 years | 960 |  |
Defined benefit plan obligation, payments due by period |  |  |
Defined benefit plan obligation | 11,782 |  |
Less than 1 year | 156 |  |
1-3 years | 334 |  |
3-5 years | 381 |  |
After 5 years | 10,911 |  |
Total contractual obligations, payments due by period |  |  |
Total Contractual obligations | 520,607 |  |
Less than 1 year | 193,711 |  |
1-3 years | 20,303 |  |
3-5 years | 293,769 |  |
After 5 years | 12,824 |  |
Other Commercial Commitments-letters of credit, payments due by period |  |  |
Total other commercial commitments-letters of credit | 114,596 |  |
Less than 1 year | 68,203 |  |
1-3 years | 30,413 |  |
3-5 years | 467 |  |
After 5 years | 15,513 |  |
Operating Leases |  |  |
Rent expense | $ 9,400 | $ 10,200 | $ 9,000

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