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Derivative Financial Instruments (Details) - USD ($)
3 Months Ended 6 Months Ended
Jan. 04, 2016
Jan. 23, 2014
Jun. 30, 2017
Jun. 30, 2016
Mar. 31, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Nov. 25, 2015
Derivatives, Fair Value [Line Items]                  
Hedge ineffectiveness gain (loss)         $ 0 $ 0      
Fair value of derivative instrument [Abstract]                  
Fair value of interest rate swaps     $ (346,000)     (346,000)   $ (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     $ 7,100,000     7,100,000     $ 9,100,000
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)     1.71%     1.71%      
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)     $ (5,000) $ (109,000)   $ 77,000 $ (442,000)    
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)     $ 40,000 $ 71,000   $ 93,000 $ 134,000