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2416407 - Disclosure - Income Taxes - Reconciliation of Beginning and Ending Amount of Consolidated Liability for Unrecognized Income Tax Benefits (Detail)
(http://brooks.com/role/IncomeTaxesReconciliationOfBeginningAndEndingAmountOfConsolidatedLiabilityForUnrecognizedIncomeTaxBenefitsDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000933974 (http://www.sec.gov/CIK)
Income Tax Disclosure [Abstract]Period [Axis]
2015-10-01 - 2016-09-30
2014-10-01 - 2015-09-30
2013-10-01 - 2014-09-30
Income Tax Disclosure [Abstract]
 
 
 
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
 
 
 
Beginning Balance
2,191,000  
4,262,000  
5,147,000  
Reductions from lapses in statutes of limitations
(897,000) 
(734,000) 
(861,000) 
Reductions from settlements with taxing authorities
 
(1,304,000) 
 
Additions for tax positions in current year
4,165,000  
  
Foreign exchange rate adjustment
(32,000) 
(33,000) 
(24,000) 
Ending Balance
5,427,000  
 
2,191,000  
 
4,262,000