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Derivative Financial Instruments (Details) - USD ($)
3 Months Ended 6 Months Ended
Jan. 23, 2014
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Derivatives, Fair Value [Line Items]            
Hedge ineffectiveness gain (loss)       $ 0 $ 0  
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       Sep. 30, 2023    
Notional value   $ 6,100,000   $ 6,100,000    
Fixed interest rate (in hundredths) 2.86%          
Unrealized net loss recorded in Accumulated other comprehensive loss       500,000    
Fair value of interest rate swap liability   $ (507,000)   $ (507,000)   $ (278,000)
Interest Rate Swap Contracts | One Month LIBOR            
Derivatives, Fair Value [Line Items]            
One month variable interest rate (in hundredths)   0.18%   0.18%    
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)   $ (6,000) $ (120,000) $ (230,000) (182,000)  
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)   $ 37,000 $ 6,000 $ 56,000 $ 12,000