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Revenue Recognition - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]        
Service charges on deposits $ 469,000 $ 484,000 $ 1,495,000 $ 1,419,000
Noninterest income $ 2,732,000 $ 2,284,000 8,912,000 7,279,000
Service Fees and Transaction-Based Fees Income        
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]        
Service charges on deposits     $ 545,000 $ 558,000
Percentage on revenue     1.30% 1.50%
Overdraft and NSF Fees Income        
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]        
Service charges on deposits     $ 707,000 $ 861,000
Percentage on revenue     1.70% 2.30%
Wire Transfer Fee Income        
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]        
Percentage on revenue     0.60% 0.70%
Noninterest income     $ 243,000 $ 243,000