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Business Combinations Percentage of Businesses Acquired Textuals (Details) - USD ($)
 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Jul. 01, 2014
May. 01, 2014
Dec. 31, 2013
Sep. 01, 2012
Aug. 01, 2012
Business Acquisition [Line Items]                
Business Acquisition, Percentage of Voting Interests Acquired             100.00% 100.00%
Funding from Holdback Payments           $ 2,550,000    
Other Payments to Acquire Businesses $ 7,693,000 $ 1,839,000 $ 3,843,000          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets           3,863,000    
Goodwill plus Intangibles Acquired           $ 13,137,000    
Purchase price   17,000,000 68,600,000          
Acquisition Holdback Payable     $ 1,015,000          
Knox Acquisition [Member]                
Business Acquisition [Line Items]                
Business Acquisition, Percentage of Voting Interests Acquired       100.00%        
Total Consideration $ 132,000,000              
Cash Paid at Close       $ 118,000,000        
Funding from Holdback Payments       14,000,000        
Debt Instrument, Interest Rate During Period 1.50%              
Purchase price $ 132,800,000              
Reliance Acquisition [Member]                
Business Acquisition [Line Items]                
Business Acquisition, Percentage of Voting Interests Acquired         100.00%      
Total Consideration   $ 179,800,000            
Funding from Holdback Payments         $ 20,000,000      
Debt Instrument, Interest Rate During Period   2.00%            
Funding from Canadian Cash         31,900,000      
Funding From Existing Credit Facility         36,600,000      
Funding from New Credit Facility         $ 100,000,000      
Other Payments to Acquire Businesses   $ 1,448,000            
Purchase price   $ 188,500,000            
Rodensa, GSB & Ira Acquisition [Member]                
Business Acquisition [Line Items]                
Total Consideration 54,900,000              
Funding from Holdback Payments       6,900,000        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets       21,200,000        
Goodwill plus Intangibles Acquired       33,700,000        
Other Current Liabilities [Member]                
Business Acquisition [Line Items]                
Funding from Holdback Payments 19,200,000              
Other Liabilities [Member]                
Business Acquisition [Line Items]                
Funding from Holdback Payments 6,500,000              
Other Noncurrent Liabilities [Member]                
Business Acquisition [Line Items]                
Funding from Holdback Payments $ 3,900,000              
Prudential Facility [Member]                
Business Acquisition [Line Items]                
Long-term Debt       $ 120,000,000        
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate       3.19%