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Long Term Debt (Narrative) (Details) (USD $)
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2014
Bank revolving credit facility
Amended and Restated Revolving Credit Agreement
Sep. 30, 2014
Standby Letters of Credit
Bank revolving credit facility
Amended and Restated Revolving Credit Agreement
May 13, 2014
Specialized Industries LP
Revolving Credit Facility
Amended and Restated Revolving Credit Agreement
May 12, 2014
Specialized Industries LP
Revolving Credit Facility
Amended and Restated Revolving Credit Agreement
Debt Instrument [Line Items]            
Amount of line of credit         $ 250,000,000 $ 100,000,000
Aggregate Commitments     250,000,000      
Maximum amount of additional aggregate commitments (Up to $50,000,000)     50,000,000      
Total debt 190,857,000 428,000 190,000,000      
Amount of capacity       685,000    
Available borrowings     $ 59,315,000