Derivatives and Hedging - Financial Statement Impact of Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Designated as Hedging Instrument
Gain Loss on Derivatives Not Designated as Hedging Instruments [Abstract]
Total (loss)	$ (7,763)	$ (4,027)	$ (11,709)	$ (4,027)
Foreign currency forward contracts | Designated as Hedging Instrument
Gain Loss on Derivatives Not Designated as Hedging Instruments [Abstract]
Amount of gain (loss) recognized in income	856	(263)	(159)	(263)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amount of loss recognized in income, net of tax	856	(263)	(159)	(263)
Interest rate swap agreements | Designated as Hedging Instrument
Gain Loss on Derivatives Not Designated as Hedging Instruments [Abstract]
Amount of gain (loss) recognized in income	(8,619)	(3,764)	(11,550)	(3,764)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amount of loss recognized in income, net of tax	(8,619)	(3,764)	(11,550)	(3,764)
Sales
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
(Loss) Reclassified from AOCI, Net of Tax		(351)		(351)
Sales | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Total (loss)	(121)		(555)
Sales | Foreign currency forward contracts | Cash Flow Hedging
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
(Loss) Reclassified from AOCI, Net of Tax	(121)	(191)	(555)	(191)
Sales | Foreign currency forward contracts | Designated as Hedging Instrument
Gain Loss on Derivatives Not Designated as Hedging Instruments [Abstract]
Amount of gain (loss) recognized in income		(160)		(160)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amount of loss recognized in income, net of tax		(160)		(160)
Sales | Interest rate swap agreements | Cash Flow Hedging
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
(Loss) Reclassified from AOCI, Net of Tax	0	0	0	0
Sales | Interest rate swap agreements | Designated as Hedging Instrument
Gain Loss on Derivatives Not Designated as Hedging Instruments [Abstract]
Amount of gain (loss) recognized in income	0		0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amount of loss recognized in income, net of tax	0		0
Total (loss)		0		0
Acquisition-related Costs
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
(Loss) Reclassified from AOCI, Net of Tax		2,930		(70,777)
Acquisition-related Costs | Foreign currency forward contracts | Cash Flow Hedging
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
(Loss) Reclassified from AOCI, Net of Tax		0		0
Acquisition-related Costs | Foreign currency forward contracts | Designated as Hedging Instrument
Gain Loss on Derivatives Not Designated as Hedging Instruments [Abstract]
Amount of gain (loss) recognized in income		2,930		(70,777)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amount of loss recognized in income, net of tax		2,930		(70,777)
Acquisition-related Costs | Interest rate swap agreements | Cash Flow Hedging
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
(Loss) Reclassified from AOCI, Net of Tax		0		0
Acquisition-related Costs | Interest rate swap agreements | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Total (loss)		0		0
Interest Expense
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
(Loss) Reclassified from AOCI, Net of Tax		77		77
Interest Expense | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Total (loss)	(1,490)		(3,172)
Interest Expense | Foreign currency forward contracts | Cash Flow Hedging
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
(Loss) Reclassified from AOCI, Net of Tax	0	0	0	0
Interest Expense | Foreign currency forward contracts | Designated as Hedging Instrument
Gain Loss on Derivatives Not Designated as Hedging Instruments [Abstract]
Amount of gain (loss) recognized in income		0		0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amount of loss recognized in income, net of tax		0		0
Interest Expense | Interest rate swap agreements | Cash Flow Hedging
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
(Loss) Reclassified from AOCI, Net of Tax	(1,383)	(55)	(2,897)	(55)
Interest Expense | Interest rate swap agreements | Designated as Hedging Instrument
Gain Loss on Derivatives Not Designated as Hedging Instruments [Abstract]
Amount of gain (loss) recognized in income	(107)		(275)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amount of loss recognized in income, net of tax	$ (107)		$ (275)
Total (loss)		$ 132		$ 132