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Long-term Debt and Line of Credit - Derivative Financial Instruments (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Sep. 16, 2015
USD ($)
contract
Debt Instrument [Line Items]      
Percent of aggregate principal amount hedged     50.00%
Interest rate swap liability $ 382 $ 145  
Swap      
Debt Instrument [Line Items]      
Derivative, notional amount     $ 67,500
Derivative, number of instruments held (contract) | contract     5