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Investment Securities (Available-for-sale And Held-to-maturity Securities, Continuous Unrealized Loss Position) (Details)
$ in Thousands
Jun. 30, 2022
USD ($)
security
Dec. 31, 2021
USD ($)
security
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 287 87
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months, Fair Value $ 655,121 $ 268,572
12 months or longer, Fair Value 143,656 107,026
Total, Fair Value 798,777 375,598
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (18,970) (437)
12 months or longer, Unrealized losses (12,416) (5,147)
Total, Unrealized losses $ (31,386) $ (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 $ 24,453  
12 months or longer, Fair Value 2,434 $ 2,700
Total, Fair Value 26,887 2,700
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (857)  
12 months or longer, Unrealized losses (36) (47)
Total, Unrealized losses $ (893) $ (47)
Asset-backed Securities [Member]    
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 59 42
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months, Fair Value $ 252,857 $ 243,598
12 months or longer, Fair Value 93,042 1,197
Total, Fair Value 345,899 244,795
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (7,312) (235)
12 months or longer, Unrealized losses (3,577) (6)
Total, Unrealized losses $ (10,889) $ (241)
Tax-exempt Obligations Of States And Political Subdivisions [Member]    
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 1  
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months, Fair Value $ 1,143  
Total, Fair Value 1,143  
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (16)  
Total, Unrealized losses $ (16)  
Taxable Obligations Of States And Political Subdivisions [Member]    
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 21  
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months, Fair Value $ 36,616  
Total, Fair Value 36,616  
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (526)  
Total, Unrealized losses $ (526)  
Residential Mortgage-backed Securities [Member]    
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 131 30
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months, Fair Value $ 135,304 $ 21,640
12 months or longer, Fair Value 5,324 5,160
Total, Fair Value 140,628 26,800
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (5,227) (159)
12 months or longer, Unrealized losses (466) (122)
Total, Unrealized losses $ (5,693) $ (281)
Collateralized Mortgage Obligation Securities [Member]    
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 20  
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months, Fair Value $ 48,815  
Total, Fair Value 48,815  
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (842)  
Total, Unrealized losses $ (842)  
Commercial Mortgage-backed Securities [Member]    
Available-for-sale, continuous unrealized loss position [Abstract]    
Number of securities | security 42 12
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract]    
Less than 12 months, Fair Value $ 155,933 $ 3,334
12 months or longer, Fair Value 36,935 91,355
Total, Fair Value 192,868 94,689
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
Less than 12 months, Unrealized losses (4,190) (43)
12 months or longer, Unrealized losses (4,258) (1,586)
Total, Unrealized losses $ (8,448) $ (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 $ 5,921 $ 6,614
Total, Fair Value 5,921 6,614
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract]    
12 months or longer, Unrealized losses (4,079) (3,386)
Total, Unrealized losses $ (4,079) $ (3,386)