Investments (Gross Unrealized Losses And Fair Value Of Investments) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 134,284	$ 9,637
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	13,091	10,337
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	891,127	955,196
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	138,469	133,941
Debt Securities, Available-for-sale, Unrealized Loss Position	1,025,411	964,833
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	151,560	144,278
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0	0
Obligations of states and political subdivisions
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	19,724	7,591
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	422	66
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	151,508	180,560
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	15,097	16,023
Debt Securities, Available-for-sale, Unrealized Loss Position	171,232	188,151
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	15,519	16,089
U.S. Government agencies
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	114,560	2,046
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	12,669	10,271
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	710,651	741,011
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	121,998	115,482
Debt Securities, Available-for-sale, Unrealized Loss Position	825,211	743,057
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	134,667	125,753
Private label
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	0	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	4,933	4,738
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	163	293
Debt Securities, Available-for-sale, Unrealized Loss Position	4,933	4,738
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	163	293
Trust preferred securities
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	0	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	4,278
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	321
Debt Securities, Available-for-sale, Unrealized Loss Position	0	4,278
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	0	321
Corporate securities
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	0	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	24,035	24,609
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	1,211	1,822
Debt Securities, Available-for-sale, Unrealized Loss Position	24,035	24,609
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 1,211	$ 1,822