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Subsequent Events - Additional Information (Detail) - USD ($)
$ in Millions
Jun. 29, 2020
Jun. 27, 2020
Revolving Credit Facility [Member]    
Subsequent Event [Line Items]    
Amount available under credit facility   $ 0.2
Undrawn letters of credit   99.0
Letters of Credit [Member]    
Subsequent Event [Line Items]    
Undrawn letters of credit   $ 0.8
Subsequent Event [Member] | Revolving Credit Facility [Member]    
Subsequent Event [Line Items]    
Repayment of outstanding borrowings $ 99.0  
Amount available under credit facility 99.2  
Subsequent Event [Member] | Letters of Credit [Member]    
Subsequent Event [Line Items]    
Undrawn letters of credit $ 0.8