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Long-Term Debt (Schedule of Long-Term Debt) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Total debt $ 64,118 $ 80,462
Less: current portion of long-term debt (3,896) (4,707)
Less: deferred financing costs (1,659) (749)
Long-term debt, net 58,563 75,006
Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Total debt 33,500 38,024
Notes [Member]    
Debt Instrument [Line Items]    
Total debt 19,000 19,000
Term Loan [Member]    
Debt Instrument [Line Items]    
Total debt 10,000 21,541
Capital Leases [Member]    
Debt Instrument [Line Items]    
Total debt $ 1,618 $ 1,897