Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Operating Revenues
Operating Revenues	$ 1,165,915	$ 1,152,662
Operating Costs and Expenses
Selling, general and administrative	270,706	263,979
Depreciation of property, plant and equipment	20,554	22,527
Amortization of intangible assets	7,824	10,751
Total Operating Costs and Expenses	1,118,442	1,117,220
Income from Operations	47,473	35,442
Equity in (losses) earnings of affiliates, net	(8,428)	2,331
Interest income	2,500	2,178
Interest expense	82,277	19,328
Non-operating pension and postretirement benefit income, net	34,617	42,417
Gain on marketable equity securities, net	43,801	104,152
Other (expense) income, net	(4,065)	1,647
Income Before Income Taxes	33,621	168,839
Provision for Income Taxes	7,900	43,500
Net Income	25,721	125,339
Net Income Attributable to Noncontrolling Interests	(1,827)	(959)
Net Income Attributable to Graham Holdings Company Common Stockholders	$ 23,894	$ 124,380
Per Share Information Attributable to Graham Holdings Company Common Stockholders
Basic net income per common share (in USD per share)	$ 5.50	$ 27.87
Basic average number of common shares outstanding (in shares)	4,320	4,432
Diluted net income per common share (in USD per share)	$ 5.45	$ 27.72
Diluted average number of common shares outstanding (in shares)	4,358	4,457
Services [Member]
Operating Revenues
Operating Revenues	$ 647,507	$ 646,410
Operating Costs and Expenses
Cost of services and goods	386,136	387,743
Goods [Member]
Operating Revenues
Operating Revenues	518,408	506,252
Operating Costs and Expenses
Cost of services and goods	$ 433,222	$ 432,220