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2422402 - Disclosure - Earnings per Share - Reconciliation of Weighted Average Common Shares Outstanding for Purposes of Calculating Basic and Diluted Earnings Per Share (Detail)
(http://brooks.com/role/EarningsPerShareReconciliationOfWeightedAverageCommonSharesOutstandingForPurposesOfCalculatingBasicAndDilutedEarningsPerShareDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000933974 (http://www.sec.gov/CIK)
Earnings Per Share [Abstract]Period [Axis]
2015-10-01 - 2016-09-30
2014-10-01 - 2015-09-30
2013-10-01 - 2014-09-30
Earnings Per Share [Abstract]
 
 
 
(Loss) income from continuing operations
(69,476,000) 
14,221,000  
1,520,000  
Income from discontinued operations, net of tax
0  
0  
30,002,000  
Net (loss) income
(69,476,000) 
14,221,000  
31,522,000  
Net income attributable to noncontrolling interests
0  
0  
(161,000) 
Net (loss) income attributable to Brooks Automation, Inc.
(69,476,000) 
14,221,000  
31,361,000  
Weighted average common shares outstanding used in computing basic earnings per share
68,507,000  
67,411,000  
66,648,000  
Dilutive common stock options and restricted stock units
0  
1,138,000  
996,000  
Weighted average common shares outstanding for purposes of computing diluted earnings per share
68,507,000  
 
68,549,000  
 
67,644,000  
 
Basic net (loss) income per share attributable to Brooks Automation, Inc. common stockholders:
 
 
 
Income (loss) from continuing operations (USD per share)
(1.01) 
.21  
.02  
Income from discontinued operations, net of tax (USD per share)
.00  
.00  
.45  
Basic net (loss) income per share attributable to Brooks Automation, Inc. (USD per share)
(1.01) 
 
.21  
 
.47  
 
Diluted net income (loss) per share attributable to Brooks Automation, Inc. common stockholders:
 
 
 
Income (loss) from continuing operations (USD per share)
(1.01) 
.21  
.02  
Income from discontinued operations, net of tax (USD per share)
.00  
.00  
.44  
Diluted net (loss) income per share attributable to Brooks Automation, Inc. common stockholders (USD per share)
(1.01) 
 
.21  
 
.46