XML 68 R54.htm IDEA: XBRL DOCUMENT v3.21.2
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Detail Textual) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Summary Of Significant Accounting Policies [Line Items]      
Amount of tax expense (benefit) for changes in the fair value of interest rate swap agreements $ 4.5 $ (8.7) $ (6.4)
Accumulated other comprehensive loss related to foreign currency translation adjustments (15.9) (38.6)  
Accumulated other comprehensive loss related to fair value of interest rate swaps (20.5) (33.2)  
Accumulated other comprehensive gain (loss) related to unrecognized post-retirement plan costs $ 0.1 $ (0.5)  
Equipment and furniture      
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful life from three to eight years    
Leasehold improvements      
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful life over the remaining lease term or the useful life of the improvements, whichever is shorter