Annual report pursuant to Section 13 and 15(d)

Acquisitions - Additional Information (Detail)

v3.5.0.2
Acquisitions - Additional Information (Detail)
$ in Thousands
12 Months Ended
Mar. 31, 2016
USD ($)
Feb. 18, 2016
USD ($)
May 23, 2014
USD ($)
Aug. 31, 2016
USD ($)
acquisition
Aug. 31, 2015
USD ($)
acquisition
Aug. 31, 2014
USD ($)
acquisition
Mar. 30, 2016
USD ($)
Feb. 17, 2016
USD ($)
Business Acquisition [Line Items]                
Transaction costs related to business acquisition activities       $ 2,700 $ 100 $ 500    
Cash paid for business acquisitions, net of cash acquired       81,916 $ 0 $ 30,500    
Recognition of Goodwill due to Business acquired     $ 14,300 $ 45,967        
Number of businesses acquired | acquisition       2 0 1    
Hayes Industries                
Business Acquisition [Line Items]                
Business Acquisition, Date of Acquisition Agreement     May 23, 2014          
Cash paid for business acquisitions, net of cash acquired     $ 30,500          
Recognition of Intangible Assets Acquired     10,550          
Larzep                
Business Acquisition [Line Items]                
Business Acquisition, Date of Acquisition Agreement   Feb. 17, 2016            
Cash paid for business acquisitions, net of cash acquired   $ 15,900            
Recognition of Goodwill due to Business acquired   $ 9,700            
Recognition of Intangible Assets Acquired               $ 4,777
Pipeline and Process Services                
Business Acquisition [Line Items]                
Business Acquisition, Date of Acquisition Agreement Mar. 30, 2016              
Cash paid for business acquisitions, net of cash acquired $ 65,500              
Recognition of Goodwill due to Business acquired $ 36,200              
Recognition of Intangible Assets Acquired             $ 8,740  
Fiscal 2016 acquisitions [Member]                
Business Acquisition [Line Items]                
Cash paid for business acquisitions, net of cash acquired       $ 81,916        
Recognition of Goodwill due to Business acquired       45,967        
Recognition of Intangible Assets Acquired       13,517        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables       20,439        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory       1,997        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other       505        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment       12,315        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable       (8,938)        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other       (1,225)        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent       $ (2,661)        
Customer Relationships | Hayes Industries                
Business Acquisition [Line Items]                
Recognition of Intangible Assets Acquired     3,300          
Customer Relationships | Larzep                
Business Acquisition [Line Items]                
Recognition of Intangible Assets Acquired               3,555
Customer Relationships | Pipeline and Process Services                
Business Acquisition [Line Items]                
Recognition of Intangible Assets Acquired             8,000  
Non-compete Agreements | Hayes Industries                
Business Acquisition [Line Items]                
Recognition of Intangible Assets Acquired     250          
Non-compete Agreements | Pipeline and Process Services                
Business Acquisition [Line Items]                
Recognition of Intangible Assets Acquired             $ 740  
Trade Names | Hayes Industries                
Business Acquisition [Line Items]                
Recognition of Intangible Assets Acquired     2,000          
Trade Names | Larzep                
Business Acquisition [Line Items]                
Recognition of Intangible Assets Acquired               $ 1,222
Patents | Hayes Industries                
Business Acquisition [Line Items]                
Recognition of Intangible Assets Acquired     $ 5,000