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Accumulated Other Comprehensive Income (Loss) Attributable to Federated Hermes, Inc. Shareholders (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period $ 1,136,997 $ 1,041,280 $ 857,121
Balance, end of period 1,114,017 1,136,997 1,041,280
Foreign Currency Translation Gain (Loss)      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period 15,171 (249) (14,617)
Other Comprehensive Income (Loss) 1,191 15,420 14,368
Balance, end of period $ 16,362 $ 15,171 $ (249)