Regulatory Authorities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
EGL [Member]
Regulatory Authorities [Line Items]
Alternative Net Capital Requirement	$ 250,000
Net Capital	238,588,000	$ 119,644,000
Alternative Excess Net Capital	238,338,000	$ 119,394,000
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