Derivatives and Hedging - Financial Statement Impact of Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jan. 31, 2020	Jan. 31, 2020
Designated as Hedging Instrument
Gain Loss on Derivatives Not Designated as Hedging Instruments [Abstract]
Total gain (loss)	$ (224)	$ (3,946)
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	(490)	(1,015)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amount of gain (loss) recognized in income, net of tax	(490)	(1,015)
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	266	(2,931)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amount of gain (loss) recognized in income, net of tax	266	(2,931)
Sales \| Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Total (loss)	(434)	(434)
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	(434)	(434)
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
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 gain (loss) recognized in income, net of tax	0	0
Interest Expense \| Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Total (loss)	(1,112)	(1,682)
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
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	(1,019)	(1,514)
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	(93)	(168)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Amount of gain (loss) recognized in income, net of tax	$ (93)	$ (168)

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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

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- Definition

Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580

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- Definition

Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e689-108580

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Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
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