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Securities (Narrative) (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2024
USD ($)
security
Dec. 31, 2023
USD ($)
security
Schedule of Available for Sale and Held to Maturity Securities [Line Items]    
Accrued interest receivable $ 3,000 $ 3,700
Amortized cost of callable debt securities 253,000  
Fair value of callable debt securities $ 225,500  
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security 196 190
Available for sale debt securities, fair value $ 970,060 $ 1,000,380
Asset Pledged as Collateral    
Schedule of Available for Sale and Held to Maturity Securities [Line Items]    
Available for sale debt securities, fair value $ 292,900 $ 311,900
Individual name issuer trust preferred debt securities    
Schedule of Available for Sale and Held to Maturity Securities [Line Items]    
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security 3 3
Securities in unrealized loss position, number of companies issuing securities | security 3  
Number of debt securities below investment grade | security 1  
Amortized cost of securities below investment grade $ 2,000  
Unrealized losses on securities below investment grade (192)  
Available for sale debt securities, fair value $ 8,975 $ 8,793
Corporate bonds [Member]    
Schedule of Available for Sale and Held to Maturity Securities [Line Items]    
Available for sale debt securities, securities in continuous unrealized loss position, number of securities | security 4 4
Securities in unrealized loss position, number of companies issuing securities | security 3  
Number of debt securities below investment grade | security 1  
Amortized cost of securities below investment grade $ 2,000  
Unrealized losses on securities below investment grade (46)  
Available for sale debt securities, fair value $ 12,405 $ 11,889
Minimum [Member]    
Schedule of Available for Sale and Held to Maturity Securities [Line Items]    
Maturity period of callable debt securities 3 months  
Call features of callable debt securities 1 month  
Maximum [Member]    
Schedule of Available for Sale and Held to Maturity Securities [Line Items]    
Maturity period of callable debt securities 13 years  
Call features of callable debt securities 4 months