Regulatory Authorities (Details) - USD ($)	3 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
EGL [Member]
Regulatory Authorities [Line Items]
Broker-Dealer, Minimum Net Capital Required, Alternative Standard	$ 250,000
Broker-Dealer, Net Capital	493,456,000	$ 331,510,000
Broker-Dealer, Excess Net Capital, Alternative Standard	493,206,000	$ 331,260,000
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