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Term Loan and Line of Credit - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended
Oct. 05, 2020
Oct. 31, 2020
Feb. 28, 2021
Feb. 29, 2020
Apr. 30, 2019
Line of Credit Facility [Line Items]          
2022     $ 26,338,000    
Revolving Line of Credit          
Line of Credit Facility [Line Items]          
Proceeds from lines of credit   $ 98,500,000      
Repayments of lines of credit     $ 15,000,000.0    
Credit Agreement          
Line of Credit Facility [Line Items]          
Additional borrowing capacity available         $ 185,000,000.0
Interest rate of credit facilities     1.75%    
Principal repayments, option one     $ 1,900,000    
Principal repayments, option two     3,800,000    
Principal repayments, option three     5,600,000    
Principal repayments, option four     7,500,000    
Principal repayments, three payment schedules     9,400,000    
Debt issuance cost     1,600,000    
Unamortized debt issuance costs     1,200,000    
Amortization of debt issuance costs     $ 100,000 $ 100,000  
Percentage of capital stock of domestic subsidiaries     100.00%    
Percentage of capital stock of first-tier foreign subsidiaries     65.00%    
Credit Agreement | Minimum          
Line of Credit Facility [Line Items]          
Commitment fee percentage     0.25%    
Credit Agreement | Minimum | Eurodollar          
Line of Credit Facility [Line Items]          
Interest rate of credit facilities     1.50%    
Credit Agreement | Minimum | Base Rate          
Line of Credit Facility [Line Items]          
Interest rate of credit facilities     0.50%    
Credit Agreement | Maximum          
Line of Credit Facility [Line Items]          
Commitment fee percentage     0.35%    
Credit Agreement | Maximum | Eurodollar          
Line of Credit Facility [Line Items]          
Interest rate of credit facilities     2.00%    
Credit Agreement | Maximum | Base Rate          
Line of Credit Facility [Line Items]          
Interest rate of credit facilities     1.00%    
Credit Agreement | Revolving Line of Credit          
Line of Credit Facility [Line Items]          
Term loan         301,000,000.0
Unsecured credit facility         100,000,000.0
Additional borrowing capacity available         125,000,000.0
Proceeds from lines of credit $ 98,500,000        
Fair value of term loan     $ 282,200,000    
2022     20,700,000    
Line of credit facility outstanding amount     83,500,000    
Credit Agreement | Swing Line Loans          
Line of Credit Facility [Line Items]          
Term loan         25,000,000.0
Credit Agreement | Letter of Credit          
Line of Credit Facility [Line Items]          
Term loan         $ 25,000,000.0
Letters of credit outstanding     $ 2,100,000