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Derivative Financial Instruments (Details) - USD ($)
3 Months Ended 9 Months Ended
Jan. 04, 2016
Jan. 23, 2014
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Derivatives, Fair Value [Line Items]              
Hedge ineffectiveness gain (loss)         $ 0 $ 0  
Fair value of derivative instrument [Abstract]              
Fair value of interest rate swaps     $ (322,000)   (322,000)   $ (424,000)
Interest Rate Swap Contracts              
Derivatives, Fair Value [Line Items]              
Percentage of Term Loan balance covered under interest rate swap contract   75.00%          
Termination of contract date Jan. 01, 2019 Sep. 30, 2023          
Notional amount $ 9,100,000   $ 7,100,000   7,100,000    
Fixed interest rate (in hundredths) 1.28% 2.86%          
Unrealized net losses recorded in Accumulated other comprehensive loss         $ 300,000    
Interest Rate Swap Contracts | One Month LIBOR              
Derivatives, Fair Value [Line Items]              
One month variable interest rate (in hundredths)     1.23%   1.23%    
Interest Rate Swap Contracts | Derivatives in Cash Flow Hedging Relationships | Interest Expense              
Effect of interest rate swap contract accounted for derivative instrument on Consolidated Statements of Income [Abstract]              
Amount of Gain (Loss) Recognized in Accumulated OCI (Effective Portion)     $ 24,000 $ 136,000 $ 101,000 (306,000)  
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)     $ 30,000 $ 67,000 $ 123,000 $ 201,000