Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net Income	$ 25,721	$ 125,339
Foreign currency translation adjustments:
Total foreign currency translation adjustments	14,267	(13,284)
Pension and other postretirement plans:
Amortization of net prior service credit included in net income	(519)	(494)
Amortization of net actuarial gain included in net income	(379)	(12,987)
Total pension and other postretirement plans, before tax	(898)	(13,481)
Cash flow hedges (loss) gain	(679)	1,111
Other Comprehensive Income (Loss), Before Tax	12,690	(25,654)
Income tax benefit related to items of other comprehensive income (loss)	406	3,162
Other Comprehensive Income (Loss), Net of Tax	13,096	(22,492)
Comprehensive Income	38,817	102,847
Comprehensive income attributable to noncontrolling interests	(1,827)	(959)
Total Comprehensive Income Attributable to Graham Holdings Company	$ 36,990	$ 101,888