Income Taxes (Schedule of Components of the Provision (Benefit) for Income Taxes and Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Current
U.S. federal	$ 267,000	$ 628,000	$ 561,000
U.S. state and local	106,000	140,000	125,000
Foreign	66,000	64,000	66,000
Total current	439,000	832,000	752,000
Deferred
U.S. federal	363,000	(8,000)	5,000
U.S. state and local	39,000	(10,000)	17,000
Foreign	3,000	(1,000)	13,000
Total deferred	405,000	(19,000)	35,000
Total (current and deferred)
U.S. federal	630,000	620,000	566,000
U.S. state and local	145,000	130,000	142,000
Foreign	69,000	63,000	79,000
Amount
Computed tax at statutory tax rate	701,000	712,000	674,000
State and local income taxes, net of federal tax benefit	124,000	93,000	116,000
Foreign tax effects	27,000	14,000	19,000
Effect of cross-border tax laws	3,000	(3,000)	(3,000)
Tax credits	(18,000)	(4,000)	(3,000)
Changes in valuation allowance	0	0	(15,000)
Nontaxable or nondeductible items	8,000	(5,000)	0
Changes in unrecognized tax benefits	(1,000)	6,000	(1,000)
Provision for income taxes	$ 844,000	$ 813,000	$ 787,000
Percent
Computed tax at statutory tax rate	21.00%	21.00%	21.00%
State and local income taxes, net of federal tax benefit	3.70%	2.70%	3.60%
Foreign tax effects	0.80%	0.40%	0.60%
Effect of cross-border tax laws	0.10%	(0.10%)	(0.10%)
Tax credits	(0.50%)	(0.10%)	(0.10%)
Changes in valuation allowance	0.00%	0.00%	(0.50%)
Nontaxable or nondeductible items	0.20%	(0.10%)	0.00%
Changes in unrecognized tax benefits	0.00%	0.20%	0.00%
Total	25.30%	24.00%	24.50%