Commitments and Contingencies (Details) - USD ($)	3 Months Ended
	Oct. 31, 2015	Dec. 10, 2015
Minimum commitments under noncancelable operating leases
Remaining fiscal year	$ 3,866,000
2017	4,155,000
2018	2,882,000
2019	2,201,000
2020	1,304,000
Thereafter	2,569,000
Total	16,977,000
Total contractual obligations
Remaining fiscal year	10,435,000
2017	10,124,000
2018	6,120,000
2019	151,778,000
2020	1,900,000
Thereafter	3,417,000
Total	183,774,000
Jet Prep Ltd.
Total contractual obligations
Contingent consideration	139,000
Assumed contingent obligation	1,138,000
Compensation agreements
Other commitments
Remaining fiscal year	4,245,000
2017	3,074,000
2018	373,000
2019	206,000
2020	206,000
Thereafter	86,000
Total	8,190,000
Contingent consideration
Other commitments
2019	36,000
2020	132,000
Thereafter	40,000
Total	208,000
Contingent consideration | Jet Prep Ltd.
Total contractual obligations
Contingent consideration	$ 139,000
Discount rate of potential payments (as a percent)	12.60%
Contingent consideration | Cantel Medical UK
Total contractual obligations
Assumed contingent obligation	$ 773,000
Assumed contingent liability
Other commitments
Remaining fiscal year	1,000
2017	19,000
2018	93,000
2019	188,000
2020	246,000
Thereafter	719,000
Total	$ 1,266,000
Assumed contingent liability | Jet Prep Ltd.
Total contractual obligations
Discount rate of potential payments (as a percent)	2.50%
Assumed contingent obligation	$ 1,138,000
Contingent guaranteed obligation
Other commitments
Remaining fiscal year	292,000
2017	208,000
2018	155,000
2019	142,000
Total	797,000
Contingent guaranteed obligation | Cantel Medical UK
Total contractual obligations
Contingent consideration	$ 773,000
Discount rate of potential payments (as a percent)	10.10%
Other long-term obligations
Other commitments
Remaining fiscal year	$ 217,000
2017	249,000
2018	198,000
2019	94,000
2020	12,000
Thereafter	3,000
Total	773,000
Credit Agreement
Maturity of the credit facility
2019	147,500,000
Total	147,500,000
Expected interest payments under the credit facility
Remaining fiscal year	1,814,000
2017	2,419,000
2018	2,419,000
2019	1,411,000
Total	$ 8,063,000
Total contractual obligations
Weighted average interest rate on outstanding borrowings (as a percent)	1.64%
Credit Agreement | Subsequent Events
Maturity of the credit facility
Total		$ 142,500,000