Securities (Schedule of Securities with Unrealized Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	$ 1,018,313	$ 759,201
Less than 12 Months Unrealized Loss	(177,161)	(13,966)
12 Months or More Fair Value	603,633	45,615
12 Months or More Unrealized Loss	(156,691)	(1,683)
Total Fair Value	1,621,946	804,816
Total Unrealized Loss	(333,852)	(15,649)
Obligations of State and Political Subdivisions
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	579,267	165,210
Less than 12 Months Unrealized Loss	(117,423)	(1,386)
12 Months or More Fair Value	122,992	1,500
12 Months or More Unrealized Loss	(44,591)	(94)
Total Fair Value	702,259	166,710
Total Unrealized Loss	(162,014)	(1,480)
MBS/CMO
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	240,344	467,888
Less than 12 Months Unrealized Loss	(20,920)	(9,100)
12 Months or More Fair Value	474,327	36,827
12 Months or More Unrealized Loss	(110,918)	(1,381)
Total Fair Value	714,671	504,715
Total Unrealized Loss	(131,838)	(10,481)
US Gov’t Sponsored Entities & Agencies
Debt Securities, Available-for-sale [Line Items]
Less than 12 Months Fair Value	198,702	126,103
Less than 12 Months Unrealized Loss	(38,818)	(3,480)
12 Months or More Fair Value	6,314	7,288
12 Months or More Unrealized Loss	(1,182)	(208)
Total Fair Value	205,016	133,391
Total Unrealized Loss	$ (40,000)	$ (3,688)