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Commitments, Contingencies and Derivatives (Additional Information) (Details)
 12 Months Ended
Dec. 31, 2018
USD ($)
swap
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Legal Proceedings [Line Items]      
Loss Contingency Accrual $ 0 $ 0  
Derivative, Number of Interest Rate Swap Agreements | swap 2    
Loss on Cash Flow Hedge Ineffectiveness $ 0 0 $ 0
Unrealized Gain (Loss) on Derivatives 89,000 37,000  
Expected reclassification of interest expense 374,000    
Interest Rate Swap [Member]      
Legal Proceedings [Line Items]      
Notional amount of derivative 43,000,000 43,000,000  
Net payments to counterparty 889,000 1,300,000 1,500,000
Derivative, Fair Value, Net (5,682,000) (7,571,000)  
Forward-Starting Interest Rate Swap [Member]      
Legal Proceedings [Line Items]      
Notional amount of derivative 25,000,000 50,000,000  
Net payments to counterparty 58,000 (288,000)  
Derivative, Fair Value, Net 30,000 21,000  
Interest Rate Lock Commitments [Member]      
Legal Proceedings [Line Items]      
Notional amount of derivative 12,077,000 21,746,000  
Derivative, Fair Value, Net 67,000 285,000  
Unrealized Gain (Loss) on Derivatives (218,000) 98,000 48,000
Forward Contracts [Member]      
Legal Proceedings [Line Items]      
Notional amount of derivative 4,315,000 8,065,000  
Derivative, Fair Value, Net 15,000 142,000  
Unrealized Gain (Loss) on Derivatives (127,000) (136,000) $ 278,000
Loans [Member] | Interest Rate Swap [Member]      
Legal Proceedings [Line Items]      
Notional amount of derivative 833,030,000 703,336,000  
Derivative, Fair Value, Net 0 0  
Other Assets [Member] | Interest Rate Swap [Member]      
Legal Proceedings [Line Items]      
Cash held as collateral 5,800,000    
Other Assets [Member] | Interest Rate Lock Commitments [Member]      
Legal Proceedings [Line Items]      
Notional amount of derivative 8,239,000 19,886,000  
Other Assets [Member] | Forward Contracts [Member]      
Legal Proceedings [Line Items]      
Notional amount of derivative 2,593,000 $ 6,692,000  
Interest-bearing Deposits [Member] | Forward-Starting Interest Rate Swap [Member]      
Legal Proceedings [Line Items]      
Cash held as collateral $ 5,400,000