Investment Securities (Securities With A Continuous Unrealized Losses Position) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	$ 93,855	$ 271,470
Less than 12 months, Unrealized Loss	(1,336)	(3,280)
12 months or more, Fair Value	73,978	93,762
12 months or more, Unrealized Loss	(2,371)	(5,079)
Total, Fair Value	167,833	365,232
Total, Unrealized Loss	(3,707)	(8,359)
State And Municipals [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	6,662	102,882
Less than 12 months, Unrealized Loss	(83)	(1,639)
12 months or more, Fair Value	5,084	62,995
12 months or more, Unrealized Loss	(156)	(3,778)
Total, Fair Value	11,746	165,877
Total, Unrealized Loss	(239)	(5,417)
Pass-Through Mortgage Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	5,287	38,421
Less than 12 months, Unrealized Loss	(14)	(142)
12 months or more, Fair Value	4,084	23,425
12 months or more, Unrealized Loss	(25)	(1,027)
Total, Fair Value	9,371	61,846
Total, Unrealized Loss	(39)	(1,169)
Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	30,886	32,577
Less than 12 months, Unrealized Loss	(259)	(89)
12 months or more, Fair Value		7,342
12 months or more, Unrealized Loss		(274)
Total, Fair Value	30,886	39,919
Total, Unrealized Loss	(259)	(363)
Corporate Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Fair Value	51,020	97,590
Less than 12 months, Unrealized Loss	(980)	(1,410)
12 months or more, Fair Value	64,810
12 months or more, Unrealized Loss	(2,190)
Total, Fair Value	115,830	97,590
Total, Unrealized Loss	$ (3,170)	$ (1,410)