Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Revenues
Operating Revenues	$ 3,924,493	$ 3,185,974	$ 2,889,121
Operating Costs and Expenses
Selling, general and administrative	921,739	831,853	715,401
Depreciation of property, plant and equipment	73,297	71,415	74,257
Amortization of intangible assets	58,851	57,870	56,780
Impairment of goodwill and other long-lived assets	128,990	32,940	30,170
Total Operating Costs and Expenses	3,840,595	3,108,599	2,788,714
Income from Operations	83,898	77,375	100,407
Equity in (losses) earnings of affiliates, net	(2,837)	17,914	6,664
Interest income	3,226	3,409	3,871
Interest expense	(54,403)	(33,943)	(38,310)
Non-operating pension and postretirement benefit income, net	197,939	109,230	59,315
(Loss) gain on marketable equity securities, net	(139,589)	243,088	60,787
Other income, net	33,500	32,554	214,534
Income Before Income Taxes	121,734	449,627	407,268
Provision for Income Taxes	51,300	96,300	107,300
Net Income	70,434	353,327	299,968
Net (Income) Loss Attributable to Noncontrolling Interests	(3,355)	(1,252)	397
Net Income Attributable to Graham Holdings Company Common Stockholders	$ 67,079	$ 352,075	$ 300,365
Per Share Information Attributable to Graham Holdings Company Common Stockholders
Basic net income per common share (in USD per share)	$ 13.83	$ 70.65	$ 58.30
Basic average number of common shares outstanding (in shares)	4,823	4,951	5,124
Diluted net income per common share (in USD per share)	$ 13.79	$ 70.45	$ 58.13
Diluted average number of common shares outstanding (in shares)	4,836	4,965	5,139
Services [Member]
Operating Revenues
Operating Revenues	$ 2,328,869	$ 2,089,800	$ 2,056,228
Operating Costs and Expenses
Cost of services and goods	1,346,519	1,243,384	1,239,241
Goods [Member]
Operating Revenues
Operating Revenues	1,595,624	1,096,174	832,893
Operating Costs and Expenses
Cost of services and goods	$ 1,311,199	$ 871,137	$ 672,865