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Derivative Financial Instruments (Details) - USD ($)
12 Months Ended
Jan. 18, 2018
Jan. 23, 2014
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 04, 2016
Derivatives, Fair Value [Line Items]            
Hedge ineffectiveness gain (loss)     $ 0 $ 0 $ 0  
Fair value of derivative instrument [Abstract]            
Fair value of interest rate swap     (278,000) (116,000)    
Interest Rate Swap Contracts            
Derivatives, Fair Value [Line Items]            
Unrealized net losses recorded in Accumulated other comprehensive loss     278,000      
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)     (162,000) 105,000 203,000  
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)     $ (41,000) $ 27,000 $ 150,000  
Interest Rate Swap, Effective January 23, 2014            
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 amount     $ 6,300,000      
Fixed interest rate (in hundredths)     2.86%      
Interest Rate Swap, Effective January 23, 2014 | One Month LIBOR            
Derivatives, Fair Value [Line Items]            
One month variable interest rate (in hundredths)     1.75%      
Interest Rate Swap Effective January 4, 2016            
Derivatives, Fair Value [Line Items]            
Termination of contract date     Jan. 01, 2019      
Notional amount           $ 9,100,000
Interest earned upon termination of swap agreement $ 27,000