Earnings Per Share Attributable to Federated Hermes, Inc. Shareholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator
Net Income Attributable to Federated Hermes, Inc.	$ 81,196	$ 62,724	$ 145,374	$ 117,270
Less: Total Net Income Available to Participating Unvested Restricted Shareholders	(3,171)	(2,404)	(5,568)	(4,542)
Total Net Income Attributable to Federated Hermes Common Stock - Basic	78,025	60,320	139,806	112,728
Less: Total Net Income Available to Unvested Restricted Shareholders of a Nonpublic Consolidated Subsidiary	(307)	(166)	(395)	(199)
Total Net Income Attributable to Federated Hermes Common Stock - Diluted	$ 77,718	$ 60,154	$ 139,411	$ 112,529
Denominator
Basic and Diluted Weighted-Average Federated Hermes Common Stock (in shares)	96,800	97,330	97,073	97,163
Earnings Per Share
Net Income Attributable to Federated Hermes Common Stock – Basic (usd per share)	$ 0.81	$ 0.62	$ 1.44	$ 1.16
Net Income Attributable to Federated Hermes Common Share—Diluted (usd per share)	$ 0.80	$ 0.62	$ 1.44	$ 1.16