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Goodwill and Identifiable Intangible Assets - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]      
Intangible amortization expense $ 30.1 $ 33.1 $ 32.9