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EMPLOYEE BENEFIT PLANS - Change in Benefit Obligation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
Change in Benefit Obligation      
Benefit obligation at beginning of year $ 13,896 $ 13,690  
Translation adjustment (933) (941)  
Service costs   34 $ 58
Interest costs 582 671 697
Curtailment (1,187)    
Actuarial (gain) loss 1,226 585  
Benefits paid (279) (143)  
Benefit obligation at end of year 13,305 13,896 13,690
Change in Plan Assets      
Fair value of plan assets at beginning of year 7,090 7,711  
Translation adjustment (923) (849)  
Actual return on plan assets 488 366  
Company contributions 55 77  
Benefits paid (1,500) (215)  
Fair value of plan assets at end of year 5,210 7,090 7,711
Funded status (8,095) (6,806)  
Net amount recognized (8,095) (6,806)  
Amount recognized in consolidated balance sheets consists of:      
Investments 648 782  
Accrued pension liability (8,581) (6,829)  
Accumulated other comprehensive income 2,792 2,488  
Net Periodic Benefit Costs      
Service costs   34 58
Interest costs 582 671 697
Expected return on plan assets (303) (418) (393)
Amortization of prior service costs 420 615 615
Recognized actuarial loss 43 204 144
Net periodic benefit cost $ 742 $ 1,106 $ 1,121
Weighted average assumptions at year-end:      
Discount rate (as a percent) 3.50% 4.50%  
Expected return on plan assets (as a percent) 4.80% 5.10%  
Rate of compensation increase (as a percent) 2.90% 2.00%