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STOCKHOLDERS' EQUITY - OSI Plans (Details) - USD ($)
 1 Months Ended 12 Months Ended
Dec. 31, 2023
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Weighted average assumptions used to determine the fair value calculations for stock options issued        
Expected holding period (in years)   4 years 6 months 4 years 6 months 4 years 6 months
Weighted-Average Fair Value        
Granted (in dollars per share)   $ 95.42 $ 87.90 $ 90.31
Employee Stock Purchase Plan        
Weighted-Average Fair Value        
Shares available for grant   353,651    
OSI Plans        
Weighted-Average Fair Value        
Additional maximum number of shares of common stock which may be issued 2,400,000      
Increase in maximum number of shares authorized under share based compensation plan 9,500,000      
Shares available for grant   2,500,000    
OSI Plans | Minimum        
Stockholders' Equity        
Percentage of voting power owned   10.00%    
Purchase price expressed as a percentage of the fair market value of the Company's common stock on the date of grant   110.00%    
OSI Plans | Employee Stock Option        
Stockholders' Equity        
Vesting period   3 years    
Weighted average assumptions used to determine the fair value calculations for stock options issued        
Risk-free interest rate (as percent)   4.50% 3.90% 1.20%
Expected volatility (as percent)   29.00% 31.00% 31.00%
Number of Options        
Outstanding at the beginning of the period (in shares)   83,677 110,645 255,220
Granted (in shares)   22,438 23,351 22,954
Exercised (in shares)   (22,698) (47,354) (166,629)
Expired or forfeited (in shares)   (4,459) (2,965) (900)
Outstanding at the end of the period (in shares)   78,958 83,677 110,645
Exercisable at the end of the period (in shares)   34,647    
Weighted Average Exercise Price        
Outstanding at the beginning of the period (in dollars per share)   $ 87.09 $ 82.43 $ 50.24
Granted (in dollars per share)   119.45 87.90 96.38
Exercised (in dollars per share)   81.67 77.42 35.09
Expired or forfeited (in dollars per share)   86.72 74.06 73.99
Outstanding at the end of the period (in dollars per share)   97.87 87.09 82.43
Exercisable at the end of the period (in dollars per share)   $ 88.53    
Weighted-Average Remaining Contractual Term        
Outstanding at the end of the period   7 years 7 months 6 days    
Exercisable at the end of the period   6 years 1 month 6 days    
Aggregate Intrinsic Value        
Outstanding at the end of the period   $ 3,131    
Exercisable at the end of the period   $ 1,698    
Stock-based compensation, other disclosures        
Weighted-average grant-date fair value of stock options (in dollars per share)   $ 38.28 $ 28.46 $ 26.72
Total intrinsic value of options exercised   $ 1,100,000    
OSI Plans | Incentive stock options | Minimum        
Stockholders' Equity        
Percentage of voting power owned   10.00%    
Purchase price expressed as a percentage of the fair market value of the Company's common stock on the date of grant   110.00%    
OSI Plans | Restricted stock and RSU        
Shares        
Nonvested at the beginning of the period (in shares)   455,515 427,447 435,925
Granted (in shares)   333,114 357,475 334,435
Vested (in shares)   (390,375) (313,862) (337,442)
Forfeited (in shares)   (6,663) (15,545) (5,471)
Nonvested at the end of the period (in shares)   391,591 455,515 427,447
Weighted-Average Fair Value        
Nonvested at the beginning of the period (in dollars per share)   $ 85.15 $ 90.17 $ 84.16
Granted (in dollars per share)   95.42 87.90 90.31
Vested (in dollars per share)   79.75 96.36 82.66
Forfeited (in dollars per share)   88.76 88.42 83.66
Nonvested at the end of the period (in dollars per share)   $ 99.21 $ 85.15 $ 90.17
Total fair value of shares vested   $ 31,100,000 $ 30,200,000 $ 27,900,000
Number of shares available for grant reduced for each award granted   1.87    
Number of shares available for grant increased for each award forfeited and returned   1.87    
OSI Plans | Restricted stock and RSU | Minimum        
Stockholders' Equity        
Vesting period   3 years    
OSI Plans | Restricted stock and RSU | Maximum        
Stockholders' Equity        
Vesting period   4 years    
OSI Plans | Performance-based restricted stock units        
Shares        
Granted (in shares)   75,988 110,811 96,620
OSI Plans | Performance-based restricted stock units | Minimum        
Weighted-Average Fair Value        
Payout as a percentage of the original number of shares awarded or units awarded, which are converted into shares of the company's common stock   0.00%    
OSI Plans | Performance-based restricted stock units | Maximum        
Weighted-Average Fair Value        
Payout as a percentage of the original number of shares awarded or units awarded, which are converted into shares of the company's common stock   376.00%