Earnings Per Share Attributable to Federated Hermes, Inc. Shareholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator
Net Income Attributable to Federated Hermes, Inc.	$ 85,822	$ 72,962	$ 231,196	$ 190,232
Less: Total Net Income Available to Participating Unvested Restricted Shareholders	(3,378)	(2,774)	(8,937)	(7,322)
Total Net Income Attributable to Federated Hermes Common Stock - Basic	82,444	70,188	222,259	182,910
Less: Total Net Income Available to Unvested Restricted Shareholders of a Nonpublic Consolidated Subsidiary	(391)	(258)	(786)	(457)
Total Net Income Attributable to Federated Hermes Common Stock - Diluted	$ 82,053	$ 69,930	$ 221,473	$ 182,453
Denominator
Basic and Diluted Weighted-Average Federated Hermes Common Stock (in shares)	96,039	97,306	96,726	97,211
Earnings Per Share
Net Income Attributable to Federated Hermes Common Stock – Basic (usd per share)	$ 0.86	$ 0.72	$ 2.30	$ 1.88
Net Income Attributable to Federated Hermes Common Share—Diluted (usd per share)	$ 0.85	$ 0.72	$ 2.29	$ 1.88