Regulatory Authorities (Details) - USD ($)	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
EGL [Member]
Regulatory Authorities [Line Items]
Alternative Net Capital Requirement	$ 250,000
Net Capital	217,658,000	$ 238,588,000
Alternative Excess Net Capital	217,408,000	$ 238,338,000
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