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Debt (Additional Information) (Detail) - USD ($)
3 Months Ended 9 Months Ended
Mar. 24, 2020
Apr. 13, 2018
Dec. 31, 2016
Mar. 31, 2020
Jun. 30, 2019
Mar. 31, 2019
Line of Credit Facility [Line Items]            
Letters of credit outstanding     $ 68,400,000 $ 68,400,000 $ 68,400,000 $ 68,400,000
Letter Of Credit Title Iv Disbursement Percentage     10.00%      
Commitment fee percentage       0.40%    
Credit annual fee percentage reimbursement       2.00%    
Annual fee percentage       2.25%    
Line of Credit facility, initiation date   Apr. 13, 2018        
Outstanding letters of credit       $ 71,600,000    
Long-term debt       449,610,000 401,094,000 291,589,000
Increase in line of credit facility   $ 250,000,000        
Long-term Line of Credit           0
Debt issuance costs, gross   $ 9,900,000        
Long-term debt, gross       $ 454,750,000 $ 407,000,000 $ 297,750,000
Term Loan [Member]            
Line of Credit Facility [Line Items]            
Interest rate for borrowings under the Term B Loan facility       3.99% 5.40% 5.50%
Debt instrument, maturity date   Apr. 13, 2025        
Debt instrument, face amount   $ 300,000,000        
Principal payment   750,000        
Debt issuance costs, gross   $ 7,100,000        
Amortization period   7 years        
Weighted Average            
Line of Credit Facility [Line Items]            
Application rate, percentage       2.86%    
Eurocurrency Rate [Member] | Term Loan [Member]            
Line of Credit Facility [Line Items]            
Debt instrument, description of variable rate basis       LIBOR-equivalent rate plus 3%    
Basic spread rate 3.00%     3.00%    
Base Rate [Member] | Term Loan [Member]            
Line of Credit Facility [Line Items]            
Debt instrument, description of variable rate basis       base rate plus 2%    
Basic spread rate       2.00%    
Revolver [Member]            
Line of Credit Facility [Line Items]            
Maximum borrowing capacity   $ 300,000,000        
Line of credit facility, expiration date   Apr. 13, 2023        
Foreign currency borrowing capacity   $ 200,000,000        
Long-term Line of Credit       $ 160,000,000 $ 110,000,000  
Debt issuance costs, gross   $ 2,700,000        
Amortization period   5 years        
Revolver [Member] | Minimum            
Line of Credit Facility [Line Items]            
Application rate, percentage       1.75%    
Revolver [Member] | Maximum            
Line of Credit Facility [Line Items]            
Application rate, percentage       2.75%    
Revolver [Member] | Weighted Average            
Line of Credit Facility [Line Items]            
Application rate, percentage         4.66%  
Revolver [Member] | Prime Rate [Member] | Minimum            
Line of Credit Facility [Line Items]            
Application rate, percentage       0.75%    
Revolver [Member] | Prime Rate [Member] | Maximum            
Line of Credit Facility [Line Items]            
Application rate, percentage       1.75%    
Letter of Credit [Member]            
Line of Credit Facility [Line Items]            
Maximum borrowing capacity   $ 100,000,000        
Term B Loan [Member]            
Line of Credit Facility [Line Items]            
Debt Covenant, Mandatory Cash Payment In Excess Of Amount Minimum       $ 50,000,000    
Interest Rate Swap | Term Loan [Member]            
Line of Credit Facility [Line Items]            
Derivative, Fixed Interest Rate 0.946%          
Derivative, Swaption Interest Rate       3.946%    
Interest Rate Swap | LIBOR | Minimum | Term Loan [Member]            
Line of Credit Facility [Line Items]            
Derivative, Floor Interest Rate 0.00%