Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 124,171	$ (66,615)	$ 177,148	$ 29,951
Foreign currency translation adjustments:
Translation adjustments arising during the period	2,384	(40,928)	11,378	(42,666)
Pension and other postretirement plans:
Amortization of net prior service cost included in net income	411	716	820	1,432
Amortization of net actuarial gain included in net income	(10,434)	(18,082)	(21,200)	(35,856)
Total pension and other postretirement plans, before tax	(10,023)	(17,366)	(20,380)	(34,424)
Cash flow hedges gain	1,188	1,091	258	2,733
Other Comprehensive Loss, Before Tax	(6,451)	(57,203)	(8,744)	(74,357)
Income tax benefit related to items of other comprehensive loss	2,305	4,224	5,183	8,243
Other Comprehensive Loss, Net of Tax	(4,146)	(52,979)	(3,561)	(66,114)
Comprehensive Income (Loss)	120,025	(119,594)	173,587	(36,163)
Comprehensive income attributable to noncontrolling interests	(1,383)	(870)	(2,088)	(1,812)
Total Comprehensive Income (Loss) Attributable to Graham Holdings Company	$ 118,642	$ (120,464)	$ 171,499	$ (37,975)