Business Changes and Developments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended			0 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2014	Mar. 15, 2013	Dec. 03, 2013	Mar. 16, 2013	Dec. 31, 2008
Business Acquisition [Line Items]
Subordinated Borrowings	$ 22,550				$ 0				$ 22,550	$ 0		$ 22,550
Other Long-term Liabilities	26,200				17,664				26,200	17,664
Purchase of Noncontrolling Interest									7,100	0	0
Goodwill, Acquired During Period									33,039
Finite-Lived Intangible Assets, Gross	103,279				54,269				103,279	54,269
Amortization of Intangible Assets									8,007	7,994	10,872
Equity Method Investment	76,581				67,560				76,581	67,560
Income from Equity Method Investments	1,799	1,102	2,038	241	5,993	562	1,015	756	5,180	8,326	4,852
Asset Impairment Charges										(2,888)
Disposal Group, Including Discontinued Operation, Revenue										989
Disposal Group, Including Discontinued Operation, Operating Income (Loss)										(1,542)
Special Charges									4,893	170	662
Evercore ISI [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred												90,234
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable												62,614
Other Long-term Liabilities												5,070
Goodwill, Acquired During Period												29,638
Institutional Equities [Member]
Business Acquisition [Line Items]
Purchase of Noncontrolling Interest												11,086
Noncontrolling Interest (as a percent)												38.00%
Pan [Member]
Business Acquisition [Line Items]
Equity Method Investment																4,158
Income from Equity Method Investments										(55)	90
Equity method investment (as a percent)													50.00%		68.00%
Noncontrolling Interest (as a percent)														32.00%
Evercore Private Capital Advisory L.P. [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	69.00%								69.00%
Noncontrolling Interest (as a percent)	31.00%								31.00%
Class G Interests [Member] | Evercore ISI [Member]
Business Acquisition [Line Items]
Grant Of LP Units (in units)												1,078
Class H Interests [Member] | Evercore ISI [Member]
Business Acquisition [Line Items]
Grant Of LP Units (in units)												4,095
Investment Banking [Member]
Business Acquisition [Line Items]
Goodwill, Acquired During Period									33,039
Finite-Lived Intangible Assets, Gross	53,255				4,245				53,255	4,245
Investment Management [Member]
Business Acquisition [Line Items]
Goodwill, Acquired During Period									0
Finite-Lived Intangible Assets, Gross	50,024				50,024				50,024	50,024
Acquired Mandates [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross					1,810					1,810
Acquired Mandates [Member] | Investment Banking [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross					1,810					1,810
Acquired Mandates [Member] | Investment Management [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross					0					0
Non Compete Non Solicit Agreements [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	2,084				2,084				2,084	2,084
Non Compete Non Solicit Agreements [Member] | Investment Banking [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	135				135				135	135
Non Compete Non Solicit Agreements [Member] | Investment Management [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	1,949				1,949				1,949	1,949
Other Intangible Assets Associated With Acquisition [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	7,565				2,245				7,565	2,245
Other Intangible Assets Associated With Acquisition [Member] | Investment Banking [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	5,320				0				5,320	0
Other Intangible Assets Associated With Acquisition [Member] | Investment Management [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	2,245				2,245				2,245	2,245
Client Related [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	93,630				48,130				93,630	48,130
Client Related [Member] | Investment Banking [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	47,800				2,300				47,800	2,300
Client Related [Member] | Investment Management [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	45,830				45,830				45,830	45,830
Investment Banking [Member]
Business Acquisition [Line Items]
Income from Equity Method Investments									495	2,906	2,258
Special Charges									4,893	0	662
Investment Banking [Member] | Evercore ISI [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross												47,320
Amortization of Intangible Assets									1,571
Investment Banking [Member] | Client Related Intangible Assets [Member] | Evercore ISI [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross												40,000
Finite-Lived Intangible Asset, Useful Life												5 years
Investment Banking [Member] | Trade Names [Member] | Evercore ISI [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross												2,000
Finite-Lived Intangible Asset, Useful Life												3 years
Investment Banking [Member] | Favorable Lease [Member] | Evercore ISI [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross												5,320
Finite-Lived Intangible Asset, Useful Life												7 years
Other Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred		6,900
Grant Of LP Units (in units)		72
Goodwill, Acquired During Period		3,401
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Business Acquisitions Contingent Consideration Potential Cash Payment	3,391								3,391
Other Acquisitions [Member] | Investment Banking [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life		2 years
Amortization of Intangible Assets									877
Other Acquisitions [Member] | Investment Banking [Member] | Advisory Backlog [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross		2,450
Other Acquisitions [Member] | Investment Banking [Member] | Client Related Intangible Assets [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross		1,050
Variable Interest Entity, Primary Beneficiary [Member] | Pan [Member]
Business Acquisition [Line Items]
Goodwill, Acquired During Period													3,020
Finite-Lived Intangible Assets, Gross													1,440
Finite-Lived Intangible Asset, Useful Life													7 years
Asset Impairment Charges										$ (2,718)
Vested LP Units [Member] | Class E LP Units [Member] | Evercore ISI [Member]
Business Acquisition [Line Items]
Grant Of LP Units (in units)									710
Vested LP Units [Member] | Class E LP Units [Member] | Institutional Equities [Member]
Business Acquisition [Line Items]
Grant Of LP Units (in units)												199
Vested LP Units [Member] | Class G Interests [Member] | Evercore ISI [Member]
Business Acquisition [Line Items]
Grant Of LP Units (in units)									538
Vested LP Units [Member] | Class G Interests [Member] | Institutional Equities [Member]
Business Acquisition [Line Items]
Grant Of LP Units (in units)												57
Vested LP Units [Member] | Class H Interests [Member] | Evercore ISI [Member]
Business Acquisition [Line Items]
Grant Of LP Units (in units)									2,044
Vested LP Units [Member] | Class H Interests [Member] | Institutional Equities [Member]
Business Acquisition [Line Items]
Grant Of LP Units (in units)												217
Unvested LP Units [Member] | Class E LP Units [Member] | Evercore ISI [Member]
Business Acquisition [Line Items]
Grant Of LP Units (in units)									710			710
Unvested LP Units [Member] | Class E LP Units [Member] | Institutional Equities [Member]
Business Acquisition [Line Items]
Grant Of LP Units (in units)												17
Unvested LP Units [Member] | Class G Interests [Member] | Evercore ISI [Member]
Business Acquisition [Line Items]
Grant Of LP Units (in units)									540
Unvested LP Units [Member] | Class H Interests [Member] | Evercore ISI [Member]
Business Acquisition [Line Items]
Grant Of LP Units (in units)									2,051
Purchase Price Allocation [Member] | Vested LP Units [Member] | Class E LP Units [Member] | Evercore ISI [Member]
Business Acquisition [Line Items]
Grant Of LP Units (in units)												947
Compensation Expense [Member] | Vested LP Units [Member] | Class E LP Units [Member] | Evercore ISI [Member]
Business Acquisition [Line Items]
Grant Of LP Units (in units)												710