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Securities (Schedule of Unrealized Losses) (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]    
Continuous Unrealized Loss Position of Less Than 12 Months, Estimated Fair value $ 120,136 $ 364,997
Continuous Unrealized Loss Position of Less Than 12 Months, Unrealized losses (1,526) (18,596)
Continuous Unrealized Loss Position of 12 Months or More, Estimated Fair value 351,710 171,871
Continuous Unrealized Loss Position of 12 Months or More, Unrealized losses (56,678) (43,460)
Total, Estimated Fair value 471,846 536,868
Total, Unrealized losses (58,204) (62,056)
U.S. Government treasuries [Member]    
Debt Securities, Available-for-sale [Line Items]    
Continuous Unrealized Loss Position of Less Than 12 Months, Estimated Fair value 84,250 242,470
Continuous Unrealized Loss Position of Less Than 12 Months, Unrealized losses (238) (3,113)
Continuous Unrealized Loss Position of 12 Months or More, Estimated Fair value 91,301  
Continuous Unrealized Loss Position of 12 Months or More, Unrealized losses (1,488)  
Total, Estimated Fair value 175,551 242,470
Total, Unrealized losses (1,726) (3,113)
U.S. Government Agencies [Member]    
Debt Securities, Available-for-sale [Line Items]    
Continuous Unrealized Loss Position of Less Than 12 Months, Estimated Fair value 10,107 4,285
Continuous Unrealized Loss Position of Less Than 12 Months, Unrealized losses (53) (620)
Continuous Unrealized Loss Position of 12 Months or More, Estimated Fair value 28,731 24,218
Continuous Unrealized Loss Position of 12 Months or More, Unrealized losses (6,287) (5,908)
Total, Estimated Fair value 38,838 28,503
Total, Unrealized losses (6,340) (6,528)
Mortgage-backed Securities/CMOs [Member]    
Debt Securities, Available-for-sale [Line Items]    
Continuous Unrealized Loss Position of Less Than 12 Months, Estimated Fair value 13,028 55,396
Continuous Unrealized Loss Position of Less Than 12 Months, Unrealized losses (730) (6,010)
Continuous Unrealized Loss Position of 12 Months or More, Estimated Fair value 144,760 111,689
Continuous Unrealized Loss Position of 12 Months or More, Unrealized losses (26,918) (21,878)
Total, Estimated Fair value 157,788 167,085
Total, Unrealized losses (27,648) (27,888)
Corporate Bonds [Member]    
Debt Securities, Available-for-sale [Line Items]    
Continuous Unrealized Loss Position of Less Than 12 Months, Estimated Fair value 9,628 18,729
Continuous Unrealized Loss Position of Less Than 12 Months, Unrealized losses (403) (852)
Continuous Unrealized Loss Position of 12 Months or More, Estimated Fair value 9,075  
Continuous Unrealized Loss Position of 12 Months or More, Unrealized losses (525)  
Total, Estimated Fair value 18,703 18,729
Total, Unrealized losses (928) (852)
Municipal Bonds [Member]    
Debt Securities, Available-for-sale [Line Items]    
Continuous Unrealized Loss Position of Less Than 12 Months, Estimated Fair value 3,123 44,117
Continuous Unrealized Loss Position of Less Than 12 Months, Unrealized losses (102) (8,001)
Continuous Unrealized Loss Position of 12 Months or More, Estimated Fair value 77,843 35,964
Continuous Unrealized Loss Position of 12 Months or More, Unrealized losses (21,460) (15,674)
Total, Estimated Fair value 80,966 80,081
Total, Unrealized losses $ (21,562) $ (23,675)