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Derivatives and Hedging Activities Notional Amount of Derivative Contracts (Details) - USD ($)
$ in Thousands
Oct. 31, 2021
Jul. 31, 2021
Derivative [Line Items]    
Derivative, Notional Amount $ 26,573 $ 34,304
Designated as hedging instruments [Member]    
Derivative [Line Items]    
Derivative, Notional Amount 23,052 30,724
Not designated as hedging Instruments [Member    
Derivative [Line Items]    
Derivative, Notional Amount $ 3,521 $ 3,580