Quarterly report pursuant to Section 13 or 15(d)

Acquisitions Acquisitions (Details)

v3.7.0.1
Acquisitions Acquisitions (Details)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2016
USD ($)
Feb. 18, 2016
USD ($)
Feb. 28, 2017
USD ($)
Feb. 29, 2016
USD ($)
Feb. 28, 2017
USD ($)
Feb. 29, 2016
USD ($)
Aug. 31, 2016
acquisition
Mar. 30, 2016
USD ($)
Feb. 17, 2016
USD ($)
Business Acquisition [Line Items]                  
Document Period End Date         Feb. 28, 2017        
Number of Businesses Acquired | acquisition             2    
Payments to Acquire Businesses, Net of Cash Acquired         $ 0 $ 15,026      
Goodwill, Purchase Accounting Adjustments         2,261        
Business Combination, Acquisition Related Costs       $ 700   1,300      
Net sales     $ 258,869 263,289 524,662 568,300      
Business Acquisition, Pro Forma Revenue     258,869 $ 275,115 524,662 $ 591,009      
Larzep                  
Business Acquisition [Line Items]                  
Business Acquisition, Effective Date of Acquisition   Feb. 17, 2016              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill                 $ 4,800
Business acquisitions   $ 9,700              
Payments to Acquire Businesses, Net of Cash Acquired   $ 15,900              
Pipeline and Process Services [Member]                  
Business Acquisition [Line Items]                  
Business Acquisition, Effective Date of Acquisition Mar. 30, 2016                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill               $ 8,700  
Business acquisitions $ 38,600                
Payments to Acquire Businesses, Net of Cash Acquired 65,500                
Goodwill, Purchase Accounting Adjustments $ 2,300                
Fiscal 2016 acquisitions [Member]                  
Business Acquisition [Line Items]                  
Net sales     $ 8,400   $ 17,700        
Tradenames | Larzep                  
Business Acquisition [Line Items]                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill                 1,200
Customer relationships | Larzep                  
Business Acquisition [Line Items]                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill                 $ 3,600
Customer relationships | Pipeline and Process Services [Member]                  
Business Acquisition [Line Items]                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill               8,000  
Noncompete Agreements [Member] | Pipeline and Process Services [Member]                  
Business Acquisition [Line Items]                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill               $ 700