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Goodwill and Intangible Assets - Intangible Assets Amortization Expense (Details) (10-K) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]      
Intangible asset amortization expense $ 48,105 $ 47,289 $ 50,168