Investment Securities (Securities With A Continuous Unrealized Loss Position) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	$ 395,253	$ 384,929
Less than 12 Months, Unrealized Loss	(34,617)	(8,324)
12 Months or More, Fair Value	240,914	32,129
12 Months or More, Unrealized Loss	(58,868)	(574)
Total, Fair Value	636,167	417,058
Total, Unrealized Loss	(93,485)	(8,898)
State And Municipals [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	256,859	18,429
Less than 12 Months, Unrealized Loss	(24,416)	(176)
12 Months or More, Fair Value	8,361
12 Months or More, Unrealized Loss	(4,659)
Total, Fair Value	265,220	18,429
Total, Unrealized Loss	(29,075)	(176)
Pass-Through Mortgage Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	13,731	179,575
Less than 12 Months, Unrealized Loss	(1,863)	(4,529)
12 Months or More, Fair Value	131,326	1,641
12 Months or More, Unrealized Loss	(32,299)	(62)
Total, Fair Value	145,057	181,216
Total, Unrealized Loss	(34,162)	(4,591)
Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	43,663	99,305
Less than 12 Months, Unrealized Loss	(1,338)	(3,239)
12 Months or More, Fair Value	73,122
12 Months or More, Unrealized Loss	(19,015)
Total, Fair Value	116,785	99,305
Total, Unrealized Loss	(20,353)	(3,239)
Corporate Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	81,000	87,620
Less than 12 Months, Unrealized Loss	(7,000)	(380)
12 Months or More, Fair Value	28,105	30,488
12 Months or More, Unrealized Loss	(2,895)	(512)
Total, Fair Value	109,105	118,108
Total, Unrealized Loss	$ (9,895)	$ (892)