BASIS OF PRESENTATION, CONSOLIDATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Foreign Currency Exposure (Details) - Year To Date	Jun. 30, 2019	Jun. 30, 2018
One British pound sterling into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	1.27	1.32
One euro into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	1.14	1.17
One Australian dollar into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	0.70	0.74
One Norwegian kroner into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	0.1173	0.1227
One Nigerian naira into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	0.0028	0.0028
High | One British pound sterling into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	1.32	1.43
High | One euro into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	1.14	1.24
High | One Australian dollar into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	0.72	0.78
High | One Norwegian kroner into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	0.1179	0.1290
High | One Nigerian naira into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	0.0028	0.0028
Average | One British pound sterling into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	1.29	1.36
Average | One euro into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	1.12	1.19
Average | One Australian dollar into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	0.70	0.76
Average | One Norwegian kroner into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	0.1157	0.1247
Average | One Nigerian naira into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	0.0028	0.0028
Low | One British pound sterling into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	1.25	1.31
Low | One euro into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	1.11	1.16
Low | One Australian dollar into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	0.69	0.73
Low | One Norwegian kroner into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	0.1139	0.1209
Low | One Nigerian naira into U.S. dollars
Schedule of Foreign Currency [Line Items]
Foreign currency exchange rates	0.0028	0.0028