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Debt and Financing Arrangements (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Mar. 31, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Oct. 01, 2014
Sep. 27, 2013
Debt Instrument [Line Items]                
Long-term debt $ 195,000,000     $ 195,000,000   $ 225,625,000 [1]    
Financial Liabilities:                
Effect of 1% in increase on borrowing rate 500,000     500,000        
Interest Rate Swap [Member]                
Debt Instrument [Line Items]                
Amount of hedged item             $ 150,000,000  
Notional amount of derivative 150,000,000     150,000,000   150,000,000 $ 150,000,000  
Fixed interest rate of derivative             1.89%  
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]                
Financial assets:                
Interest Rate Swap Asset 0     0   0    
Financial Liabilities:                
Interest Rate Swap Liability (Other Accrued Liabilities) 3,349,240     3,349,240   $ 2,947,438    
Other, Net [Member]                
Debt Instrument [Line Items]                
Payments of financing costs 800,000   $ 800,000 2,500,000 $ 2,400,000      
Other, Net [Member] | Interest Rate Swap [Member]                
Debt Instrument [Line Items]                
Interest expense 500,000   $ 500,000 $ 1,600,000 $ 500,000      
LIBOR Rate [Member]                
Debt Instrument [Line Items]                
Basis spread on variable rate       1.53%        
Term Loan and Revolving Facility [Member]                
Debt Instrument [Line Items]                
Partial repayment of debt 11,800,000     $ 30,600,000        
Revolving Facility [Member]                
Debt Instrument [Line Items]                
Partial repayment of debt 10,000,000 $ 15,000,000            
Credit Agreement [Member]                
Debt Instrument [Line Items]                
Additional principal amount available               $ 75,000,000
Revolving Facility [Member]                
Debt Instrument [Line Items]                
Principal amount               150,000,000
Long-term debt 75,700,000     75,700,000        
Available borrowing capacity 74,300,000     74,300,000        
Term Loan [Member]                
Debt Instrument [Line Items]                
Principal amount               150,000,000
Long-term debt 127,500,000     127,500,000        
Annual principal repayments $ 7,500,000     $ 7,500,000        
Swing Loans [Member]                
Debt Instrument [Line Items]                
Additional principal amount available               20,000,000
Letters of Credit [Member]                
Debt Instrument [Line Items]                
Additional principal amount available               $ 20,000,000
[1] Note: The condensed consolidated balance sheet at December 31, 2015 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.