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Revolving Credit Facilities and Mortgage Payable - Primary Credit Facility (Details) - Primary Credit Facility - Line of Credit - USD ($)
1 Months Ended 12 Months Ended
Sep. 30, 2018
Mar. 31, 2022
Notes Payable and Long-Term Debt    
Maximum borrowing capacity $ 600,000,000  
Additional borrowing capacity $ 200,000,000  
Revolving Credit Facility    
Notes Payable and Long-Term Debt    
Debt instrument term (in years) 5 years  
Maximum borrowing capacity $ 400,000,000  
Proceeds from lines of credit   $ 0
Repayments of lines of credit   0
Long-term line of credit   0
Outstanding letters of credit   549,000
Amount available under the credit agreement   $ 399,451,000
Revolving Credit Facility | LIBOR based interest rates    
Notes Payable and Long-Term Debt    
Interest rate, effective percentage   1.58%
Revolving Credit Facility | Alternate Base Rate based interest rates    
Notes Payable and Long-Term Debt    
Interest rate, effective percentage   3.38%
Minimum | Revolving Credit Facility    
Notes Payable and Long-Term Debt    
Fee on unused amount of revolving credit facility   0.125%
Minimum | Revolving Credit Facility | LIBOR based interest rates    
Notes Payable and Long-Term Debt    
Spread on variable interest rate 1.125%  
Minimum | Revolving Credit Facility | Alternate Base Rate based interest rates    
Notes Payable and Long-Term Debt    
Spread on variable interest rate 0.125%  
Maximum    
Notes Payable and Long-Term Debt    
Sublimit available for borrowings in foreign currency $ 175,000,000  
Maximum | Revolving Credit Facility    
Notes Payable and Long-Term Debt    
Capacity available for letters of credit $ 25,000,000  
Fee on unused amount of revolving credit facility   0.20%
Maximum | Revolving Credit Facility | LIBOR based interest rates    
Notes Payable and Long-Term Debt    
Spread on variable interest rate 1.625%  
Maximum | Revolving Credit Facility | Alternate Base Rate based interest rates    
Notes Payable and Long-Term Debt    
Spread on variable interest rate 0.625%  
Prepaid Expenses and Other Current Assets | Revolving Credit Facility    
Notes Payable and Long-Term Debt    
Deferred financing costs $ 1,297,000