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Securities (Schedule of Held-to-maturity, Unrealized Loss on Investments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Held-to-maturity:    
Less than 12 Months, Fair Value $ 253,407 $ 26,074
Less than 12 Months, Gross Unrealized Losses $ (9,740) $ (106)
Less than 12 Months, Number of Securities 49 14
12 Months or Greater, Fair Value $ 24,057  
12 Months or Greater, Gross Unrealized Losses $ (2,058)  
12 Months or Greater, Number of Securities 7  
Total, Fair Value $ 277,464 $ 26,074
Total, Gross Unrealized Losses $ (11,798) $ (106)
Total, Number of Securities 56 14
US Treasury Securities [Member]    
Held-to-maturity:    
Less than 12 Months, Fair Value $ 148,339  
Less than 12 Months, Gross Unrealized Losses $ (2,131)  
Less than 12 Months, Number of Securities 4  
Total, Fair Value $ 148,339  
Total, Gross Unrealized Losses $ (2,131)  
Total, Number of Securities 4  
US Government-sponsored Enterprises Debt Securities [Member]    
Held-to-maturity:    
Less than 12 Months, Fair Value $ 23,735 $ 21,901
Less than 12 Months, Gross Unrealized Losses $ (1,576) $ (87)
Less than 12 Months, Number of Securities 6 8
12 Months or Greater, Fair Value $ 24,057  
12 Months or Greater, Gross Unrealized Losses $ (2,058)  
12 Months or Greater, Number of Securities 7  
Total, Fair Value $ 47,792 $ 21,901
Total, Gross Unrealized Losses $ (3,634) $ (87)
Total, Number of Securities 13 8
Municipal securities [Member]    
Held-to-maturity:    
Less than 12 Months, Fair Value $ 49,628 $ 4,173
Less than 12 Months, Gross Unrealized Losses $ (4,561) $ (19)
Less than 12 Months, Number of Securities 34 6
Total, Fair Value $ 49,628 $ 4,173
Total, Gross Unrealized Losses $ (4,561) $ (19)
Total, Number of Securities 34 6
Mortgage-backed securities (GSEs) [Member]    
Held-to-maturity:    
Less than 12 Months, Fair Value $ 31,705  
Less than 12 Months, Gross Unrealized Losses $ (1,472)  
Less than 12 Months, Number of Securities 5  
Total, Fair Value $ 31,705  
Total, Gross Unrealized Losses $ (1,472)  
Total, Number of Securities 5