Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net (Loss) Income	$ (66,615)	$ 115,926	$ 29,951	$ 228,561
Foreign currency translation adjustments:
Translation adjustments arising during the period	(40,928)	1,167	(42,666)	681
Pension and other postretirement plans:
Amortization of net prior service cost included in net income	716	792	1,432	1,584
Amortization of net actuarial gain included in net income	(18,082)	(924)	(35,856)	(3,353)
Total pension and other postretirement plans, before tax	(17,366)	(132)	(34,424)	(1,769)
Cash flow hedges gain	1,091	13	2,733	634
Other Comprehensive (Loss) Income, Before Tax	(57,203)	1,048	(74,357)	(454)
Income tax expense related to items of other comprehensive (loss) income	4,224	32	8,243	331
Other Comprehensive (Loss) Income, Net of Tax	(52,979)	1,080	(66,114)	(123)
Comprehensive (Loss) Income	(119,594)	117,006	(36,163)	228,438
Comprehensive income attributable to noncontrolling interests	(870)	(568)	(1,812)	(753)
Total Comprehensive (Loss) Income Attributable to Graham Holdings Company	$ (120,464)	$ 116,438	$ (37,975)	$ 227,685