Investments (Gross Unrealized Losses And Fair Value Of Investments) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value	$ 360,612	$ 73,478
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss	2,416	245
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value	38,931	4,135
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss	358	457
Securities available-for-sale, Total, Estimated Fair Value	399,543	77,613
Securities available-for-sale, Total, Unrealized Loss	2,774	702
Obligations of states and political subdivisions
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value	10,876	10,578
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss	102	139
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value	2,419	0
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss	65	0
Securities available-for-sale, Total, Estimated Fair Value	13,295	10,578
Securities available-for-sale, Total, Unrealized Loss	167	139
U.S. Government Agencies Mortgage-backed Securities
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value	349,736	62,412
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss	2,314	105
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value	32,229	35
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss	13	0
Securities available-for-sale, Total, Estimated Fair Value	381,965	62,447
Securities available-for-sale, Total, Unrealized Loss	2,327	105
Trust preferred securities
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value	0	0
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss	0	0
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value	4,283	4,100
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss	280	457
Securities available-for-sale, Total, Estimated Fair Value	4,283	4,100
Securities available-for-sale, Total, Unrealized Loss	$ 280	457
Corporate securities
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value		488
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss		1
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value		0
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss		0
Securities available-for-sale, Total, Estimated Fair Value		488
Securities available-for-sale, Total, Unrealized Loss		$ 1