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Investment Securities (Available-for-sale And Held-to-maturity Securities, Continuous Unrealized Loss Position) (Details)
$ in Thousands
Sep. 30, 2022
USD ($)
security
Dec. 31, 2021
USD ($)
security
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 298 87
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months, Fair Value $ 555,503 $ 268,572
12 months or longer, Fair Value 217,346 107,026
Total, Fair Value 772,849 375,598
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (27,542) (437)
12 months or longer, Unrealized losses (18,124) (5,147)
Total, Unrealized losses $ (45,666) $ (5,584)
U.S. Government Agency Securities [Member]    
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 12 2
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months, Fair Value $ 20,101  
12 months or longer, Fair Value 2,409 $ 2,700
Total, Fair Value 22,510 2,700
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (1,571)  
12 months or longer, Unrealized losses (33) (47)
Total, Unrealized losses $ (1,604) $ (47)
Asset-backed Securities [Member]    
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 58 42
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months, Fair Value $ 179,430 $ 243,598
12 months or longer, Fair Value 161,551 1,197
Total, Fair Value 340,981 244,795
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (5,571) (235)
12 months or longer, Unrealized losses (8,138) (6)
Total, Unrealized losses $ (13,709) $ (241)
Tax-exempt Obligations Of States And Political Subdivisions [Member]    
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 4  
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months, Fair Value $ 3,457  
Total, Fair Value 3,457  
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (102)  
Total, Unrealized losses $ (102)  
Taxable Obligations Of States And Political Subdivisions [Member]    
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 26  
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months, Fair Value $ 39,727  
Total, Fair Value 39,727  
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (1,718)  
Total, Unrealized losses $ (1,718)  
Residential Mortgage-backed Securities [Member]    
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 132 30
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months, Fair Value $ 124,133 $ 21,640
12 months or longer, Fair Value 8,513 5,160
Total, Fair Value 132,646 26,800
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (9,413) (159)
12 months or longer, Unrealized losses (1,313) (122)
Total, Unrealized losses $ (10,726) $ (281)
Collateralized Mortgage Obligation Securities [Member]    
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 22  
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months, Fair Value $ 44,762  
Total, Fair Value 44,762  
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (1,717)  
Total, Unrealized losses $ (1,717)  
Commercial Mortgage-backed Securities [Member]    
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 43 12
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months, Fair Value $ 143,893 $ 3,334
12 months or longer, Fair Value 38,073 91,355
Total, Fair Value 181,966 94,689
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (7,450) (43)
12 months or longer, Unrealized losses (5,440) (1,586)
Total, Unrealized losses $ (12,890) $ (1,629)
Corporate Debt Securities [Member]    
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 1 1
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
12 months or longer, Fair Value $ 6,800 $ 6,614
Total, Fair Value 6,800 6,614
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
12 months or longer, Unrealized losses (3,200) (3,386)
Total, Unrealized losses $ (3,200) $ (3,386)