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Subsequent events - Additional Information (Detail) - Subsequent Event [Member] - Cash Flow Hedging [Member] - Interest Rate Swap [Member] - USD ($)
$ in Millions
Jul. 31, 2021
Aug. 04, 2020
Subsequent Event [Line Items]    
Notional amount of derivative instruments   $ 200.0
Interest rate of Derivative instruments 0.51%  
Notional amount maturity date Apr. 15, 2030  
Aggregate cash payments on swap termination   17.8
Unrealized loss included in accumulated other comprehensive loss associated with the terminated swaps   $ 17.8