Fair Value Measurements - Level 3 Liabilities (Details) - Level 3 - USD ($) $ in Thousands	12 Months Ended
Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Reconciliation of liability measured and recorded at fair value on a recurring basis using Level 3
Beginning balance	$ 1,411	$ 1,298	$ 1,138
Acquisitions	38,371		1,292
Fair value adjustments	(6,370)	113	6
Settlements/payments	(33,412)		(1,138)
Ending balance	0	1,411	1,298
Contingent Consideration \| Aexis Medical
Reconciliation of liability measured and recorded at fair value on a recurring basis using Level 3
Beginning balance	1,411	1,298	0
Acquisitions	0		1,292
Fair value adjustments	280	113	6
Settlements/payments	(1,691)		0
Ending balance	0	1,411	1,298
Contingent Consideration \| Hu-Friedy
Reconciliation of liability measured and recorded at fair value on a recurring basis using Level 3
Beginning balance	0	0	0
Acquisitions	3,271		0
Fair value adjustments	3,450	0	0
Settlements/payments	(6,721)		0
Ending balance	0	0	0
Assumed Contingent Obligation \| Jet Prep Ltd.
Reconciliation of liability measured and recorded at fair value on a recurring basis using Level 3
Beginning balance	0	0	1,138
Acquisitions	0		0
Fair value adjustments	0	0	0
Settlements/payments	0		(1,138)
Ending balance	0	0	0
Contingent Guaranteed Obligation \| Hu-Friedy
Reconciliation of liability measured and recorded at fair value on a recurring basis using Level 3
Beginning balance	0	0	0
Acquisitions	35,100		0
Fair value adjustments	(10,100)	0	0
Settlements/payments	(25,000)		0
Ending balance	$ 0	$ 0	$ 0

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

Amount of purchases of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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