Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net Income	$ 96,566	$ 112,635
Foreign currency translation adjustments:
Translation adjustments arising during the period	(1,738)	(486)
Pension and other postretirement plans:
Amortization of net prior service cost included in net income	716	792
Amortization of net actuarial gain included in net income	(17,774)	(2,429)
Total pension and other postretirement plans, before tax	(17,058)	(1,637)
Cash flow hedges gain	1,642	621
Other Comprehensive Loss, Before Tax	(17,154)	(1,502)
Income tax benefit related to items of other comprehensive loss	4,019	299
Other Comprehensive Loss, Net of Tax	(13,135)	(1,203)
Comprehensive Income	83,431	111,432
Comprehensive income attributable to noncontrolling interests	(942)	(185)
Total Comprehensive Income Attributable to Graham Holdings Company	$ 82,489	$ 111,247