Annual report pursuant to Section 13 and 15(d)

Acquisitions - Additional Information (Detail)

v2.4.0.6
Acquisitions - Additional Information (Detail) (USD $)
 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Aug. 31, 2012
Aug. 31, 2011
Aug. 31, 2010
Entity
Aug. 31, 2012
Customer Relationships
Aug. 31, 2011
Customer Relationships
Aug. 31, 2010
Customer Relationships
Aug. 31, 2012
Tradenames
Aug. 31, 2011
Tradenames
Aug. 31, 2010
Tradenames
Aug. 31, 2012
Technologies
Aug. 31, 2012
Non-compete Agreements
Aug. 31, 2011
Non-compete Agreements
Aug. 31, 2010
Non-compete Agreements
Aug. 31, 2011
Patents and Technologies
Feb. 10, 2012
Jeyco
Jun. 02, 2011
Weasler Engineering, Inc.
Dec. 10, 2010
Mastervolt International Holding B.V.
Aug. 31, 2011
Small product line acquisition
Aug. 31, 2010
Business Acquisition
Aug. 31, 2012
Engineered Solutions
Entity
Jul. 20, 2012
CrossControl
Mar. 28, 2012
Turotest
Aug. 31, 2012
Turotest
Business Acquisition [Line Items]                                              
Transaction costs related to business acquisition activities $ 1,400,000 $ 1,900,000 $ 1,100,000                                        
Reduction in goodwill amount (3,280,000) 3,580,000                                          
Purchase accounting adjustments (7,726,000)                                            
Number of tuck-in acquisitions     4                                 2      
Cash paid for business acquisitions, net of cash acquired 70,267,000 313,456,000 45,866,000                       20,700,000 153,200,000 158,200,000 200,000 43,900,000   40,500,000 8,100,000  
Deferred purchase price for business acquisitions     2,500,000                                       5,300,000
Recognition of goodwill due to acquisitions 40,289,000 152,400,000 37,100,000                                        
Recognition of intangible assets due to acquisitions 32,869,000 157,500,000 18,200,000 24,200,000 81,500,000 14,500,000 5,800,000 69,900,000 2,500,000 2,200,000 700,000 600,000 1,200,000 5,500,000                  
Deferred purchase price paid 1,000,000 1,900,000 2,000,000                                        
Purchase price, contingent consideration     $ 4,500,000