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Pension and Retirement Plans (Detail) - Components of net periodic benefit costs (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]    
Increase (decrease) in minimum liability included in other comprehensive income (loss) $ (665) $ 591
U.S.
    
Defined Benefit Plan Disclosure [Line Items]    
Increase (decrease) in minimum liability included in other comprehensive income (loss) 23 (776)
Foreign
    
Defined Benefit Plan Disclosure [Line Items]    
Increase (decrease) in minimum liability included in other comprehensive income (loss) (688) 1,367
Pension
    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 59 71
Interest cost 747 792
Expected return on plan assets (410) (462)
Prior service gains 0 0
Amortization of net (gain)/loss 165 112
Net periodic benefit cost 561 513
Increase (decrease) in minimum liability included in other comprehensive income (loss) (792) 1,353
Pension | U.S.
    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 0 10
Interest cost 64 84
Expected return on plan assets 0 0
Prior service gains 0 0
Amortization of net (gain)/loss 24 30
Net periodic benefit cost 88 124
Increase (decrease) in minimum liability included in other comprehensive income (loss) (104) (14)
Pension | Foreign
    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 59 61
Interest cost 683 708
Expected return on plan assets (410) (462)
Prior service gains 0 0
Amortization of net (gain)/loss 141 82
Net periodic benefit cost 473 389
Increase (decrease) in minimum liability included in other comprehensive income (loss) (688) 1,367
Post Retirement
    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 0 0
Interest cost 35 71
Expected return on plan assets 0 0
Prior service gains 0 0
Amortization of net (gain)/loss (183) 70
Net periodic benefit cost (148) 141
Increase (decrease) in minimum liability included in other comprehensive income (loss) 127 (762)
Post Retirement | U.S.
    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 0 0
Interest cost 35 71
Expected return on plan assets 0 0
Prior service gains 0 0
Amortization of net (gain)/loss (183) 70
Net periodic benefit cost (148) 141
Increase (decrease) in minimum liability included in other comprehensive income (loss) 127 (762)
Post Retirement | Foreign
    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 0 0
Interest cost 0 0
Expected return on plan assets 0 0
Prior service gains 0 0
Amortization of net (gain)/loss 0 0
Net periodic benefit cost 0 0
Increase (decrease) in minimum liability included in other comprehensive income (loss) $ 0 $ 0