Investment Securities (Securities With A Continuous Unrealized Loss Position) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	$ 255,326	$ 384,929
Less than 12 Months, Unrealized Loss	(17,196)	(8,324)
12 Months or More, Fair Value	213,516	32,129
12 Months or More, Unrealized Loss	(23,940)	(574)
Total, Fair Value	468,842	417,058
Total, Unrealized Loss	(41,136)	(8,898)
State And Municipals [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	95,119	18,429
Less than 12 Months, Unrealized Loss	(5,579)	(176)
12 Months or More, Fair Value	3,125
12 Months or More, Unrealized Loss	(1,029)
Total, Fair Value	98,244	18,429
Total, Unrealized Loss	(6,608)	(176)
Pass-Through Mortgage Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	46,412	179,575
Less than 12 Months, Unrealized Loss	(3,064)	(4,529)
12 Months or More, Fair Value	120,764	1,641
12 Months or More, Unrealized Loss	(13,814)	(62)
Total, Fair Value	167,176	181,216
Total, Unrealized Loss	(16,878)	(4,591)
Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	31,315	99,305
Less than 12 Months, Unrealized Loss	(3,033)	(3,239)
12 Months or More, Fair Value	60,940
12 Months or More, Unrealized Loss	(6,784)
Total, Fair Value	92,255	99,305
Total, Unrealized Loss	(9,817)	(3,239)
Corporate Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months, Fair Value	82,480	87,620
Less than 12 Months, Unrealized Loss	(5,520)	(380)
12 Months or More, Fair Value	28,687	30,488
12 Months or More, Unrealized Loss	(2,313)	(512)
Total, Fair Value	111,167	118,108
Total, Unrealized Loss	$ (7,833)	$ (892)