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Regulatory Authorities (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
EGL [Member]    
Regulatory Authorities [Line Items]    
Broker-Dealer, Minimum Net Capital Required, Alternative Standard $ 250,000  
Broker-Dealer, Net Capital 473,895,000 $ 586,814,000
Broker-Dealer, Excess Net Capital, Alternative Standard 473,645,000 $ 586,564,000
Evercore Trust Company [Member]    
Regulatory Authorities [Line Items]    
Tier One Capital 5,000,000  
Minimum Liquid Assets, Amount $ 3,500,000  
Coverage of Operating Expenses (in days) 180 days