Employee Benefits (Schedule of Fair Value of Qualified Pension Plan Assets) (Details) - Qualified Pension Plan [Member] - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 82,837	$ 81,553	$ 103,047
Asset allocations by category		100.00%	100.00%
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 21,257	$ 32,370
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		61,580	49,183
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 16,820	$ 8,438
Asset allocations by category		20.30%	10.30%
Cash and cash equivalents | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 16,820	$ 8,438
Cash and cash equivalents | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Cash and cash equivalents | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Obligations of U.S government-sponsored enterprises
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		58,147	42,601
Obligations of U.S government-sponsored enterprises | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Obligations of U.S government-sponsored enterprises | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		58,147	42,601
Obligations of U.S government-sponsored enterprises | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Obligations of states and political subdivisions
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,459	1,728
Obligations of states and political subdivisions | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Obligations of states and political subdivisions | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,459	1,728
Obligations of states and political subdivisions | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,974	4,854
Corporate bonds | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Corporate bonds | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,974	4,854
Corporate bonds | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 4,437	$ 23,932
Asset allocations by category		5.40%	29.40%
Mutual funds | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 4,437	$ 23,932
Mutual funds | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0	0
Mutual funds | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 0	$ 0
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Asset allocations by category	[1]	74.30%	60.30%

[1] Includes obligations of U.S. government agencies and U.S. government-sponsored enterprises, obligations of states and political subdivisions and corporate bonds.