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BENEFIT PLANS - Schedule of Projected Benefit Obligation (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Long-term portion (included in other noncurrent liabilities) $ 17,302 $ 19,490
Deferred Compensation Contracts    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total current and noncurrent portion 6,821 7,251
Deferred Compensation Contracts | Accrued Liabilities    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Current portion (included in accrued liabilities) 1,658 1,353
Deferred Compensation Contracts | Other Noncurrent Liabilities    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Long-term portion (included in other noncurrent liabilities) $ 5,163 $ 5,898