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Debt (Schedule of Long Term Debt) (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Current Maturities: $ 528 $ 551
Long-term debt: 203,014 190,024
Total debt 203,542 190,575
Capital lease obligations    
Debt Instrument [Line Items]    
Current Maturities: 27 35
Long-term debt: 14 24
Other notes payable    
Debt Instrument [Line Items]    
Current Maturities: 501 516
Bank revolving credit facility | Amended and Restated Revolving Credit Agreement    
Debt Instrument [Line Items]    
Long-term debt: 203,000 $ 190,000
Total debt $ 203,000