XML 117 R88.htm IDEA: XBRL DOCUMENT v3.7.0.1
Retirement Plans - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Jul. 31, 2017
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2018
Defined Benefit Plan Disclosure [Line Items]        
Employer contributions   $ 1.0    
Expected benefits payments for fiscal year 2018 $ 0.4      
Defined Contribution Pension Plan 401k        
Defined Benefit Plan Disclosure [Line Items]        
Employer matching contribution percentage of employee contributions of eligible compensation 4.00%      
Company's contributions to the plan $ 5.0 5.2 $ 5.1  
Defined Contribution Pension Plan 401k | Minimum        
Defined Benefit Plan Disclosure [Line Items]        
Percentage employees may contribute of their eligible compensation to the plan 1.00%      
Defined Contribution Pension Plan 401k | Maximum        
Defined Benefit Plan Disclosure [Line Items]        
Percentage employees may contribute of their eligible compensation to the plan 80.00%      
Analogic Canada Plan        
Defined Benefit Plan Disclosure [Line Items]        
Employer contributions $ 0.0 1.0 0.8  
Benefits paid 0.2 1.5 $ 0.4  
Expected contributions for fiscal year 2018 0.0      
Expected benefits payments for fiscal year 2018 0.4      
Analogic Canada Plan | Scenario, Forecast        
Defined Benefit Plan Disclosure [Line Items]        
Expected to be amortized, net actuarial loss       $ 0.2
Analogic Canada Plan | Other Postretirement Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
ABO balances $ 13.9 $ 14.1