DEBT - Narrative (Details) - USD ($)
3 Months Ended 12 Months Ended
Jan. 01, 2021
Jul. 31, 2019
Jan. 17, 2018
Jun. 30, 2019
Dec. 31, 2020
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Debt Disclosure [Line Items]                
Debt issuance costs, line of credit arrangements, gross     $ 4,600,000          
Revolving credit facility                
Debt Disclosure [Line Items]                
Proceeds from borrowing           $ 35,000,000 $ 218,500,000 $ 99,000,000
Repayments of debt, principal           0 399,500,000 34,000,000
Term loan facility                
Debt Disclosure [Line Items]                
Proceeds from borrowing           0 500,000,000 0
Repayments of debt, principal           25,000,000 $ 88,750,000 $ 11,250,000
Second Amended & Restated Credit Facility | Revolving credit facility                
Debt Disclosure [Line Items]                
Revolving credit facility     400,000,000          
Additional borrowing capacity     300,000,000          
Repayments of outstanding balance     $ 68,900,000          
Maximum leverage ratio     3.25          
Minimum liquidity to satisfy covenant terms     $ 250,000,000.0          
Availability of revolving credit facility to satisfy covenant term     50,000,000.0          
Proceeds from borrowing       $ 35,000,000.0        
Long-term line of credit       35,000,000.0   35,000,000.0    
Remaining borrowing capacity       365,000,000.0   365,000,000.0    
Repayment of debt, interest           100,000    
Second Amended & Restated Credit Facility | Term loan facility                
Debt Disclosure [Line Items]                
Revolving credit facility     500,000,000          
Repayments of outstanding balance           48,200,000    
Long-term line of credit       $ 462,500,000   462,500,000    
Repayments of debt, principal           25,000,000.0    
Repayment of debt, interest           $ 23,200,000    
Interest rate during period           4.15%    
Second Amended & Restated Credit Facility | Term loan facility | Subsequent event                
Debt Disclosure [Line Items]                
Interest rate during period   3.98%            
Amended Credit Agreement | Revolving credit facility                
Debt Disclosure [Line Items]                
Repayments of outstanding balance     $ 354,500,000          
Issuance fees per annum     0.125%          
Amended Credit Agreement | Revolving credit facility | Minimum                
Debt Disclosure [Line Items]                
Commitment fee percentage of unused borrowings     0.20%          
Amended Credit Agreement | Revolving credit facility | Maximum                
Debt Disclosure [Line Items]                
Commitment fee percentage of unused borrowings     0.35%          
Amended Credit Agreement | Term loan facility                
Debt Disclosure [Line Items]                
Percentage of principal due quarterly     1.25%          
Amended Credit Agreement | Sublimit for letters of credit                
Debt Disclosure [Line Items]                
Revolving credit facility     $ 10,000,000.0          
Amended Credit Agreement | Sublimit for letters of credit | Minimum                
Debt Disclosure [Line Items]                
Commitment fee percentage of unused borrowings     1.50%          
Amended Credit Agreement | Sublimit for letters of credit | Maximum                
Debt Disclosure [Line Items]                
Commitment fee percentage of unused borrowings     2.25%          
Amended Credit Agreement | Sublimit for swingline loan advances                
Debt Disclosure [Line Items]                
Revolving credit facility     $ 25,000,000.0          
Amended Credit Agreement | Base rate | Revolving credit facility | Minimum                
Debt Disclosure [Line Items]                
Debt basis spread on variable rate     0.50%          
Amended Credit Agreement | Base rate | Revolving credit facility | Maximum                
Debt Disclosure [Line Items]                
Debt basis spread on variable rate     1.25%          
Amended Credit Agreement | Base rate | Sublimit for swingline loan advances | Minimum                
Debt Disclosure [Line Items]                
Debt basis spread on variable rate     0.50%          
Amended Credit Agreement | Base rate | Sublimit for swingline loan advances | Maximum                
Debt Disclosure [Line Items]                
Debt basis spread on variable rate     1.25%          
Amended Credit Agreement | LIBOR | Revolving credit facility                
Debt Disclosure [Line Items]                
Debt basis spread on variable rate     1.00%          
Amended Credit Agreement | LIBOR | Revolving credit facility | Minimum                
Debt Disclosure [Line Items]                
Debt basis spread on variable rate     1.50%          
Amended Credit Agreement | LIBOR | Revolving credit facility | Maximum                
Debt Disclosure [Line Items]                
Debt basis spread on variable rate     2.25%          
Amended Credit Agreement | Federal funds rate | Revolving credit facility                
Debt Disclosure [Line Items]                
Debt basis spread on variable rate     0.50%          
Amended Credit Agreement | Applicable interest rate | Revolving credit facility                
Debt Disclosure [Line Items]                
Debt basis spread over applicable interest rate     2.00%          
Forecast | Amended Credit Agreement | Term loan facility                
Debt Disclosure [Line Items]                
Percentage of principal due quarterly 2.50%       1.875%