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Noncontrolling Interest - Additional Information (Details) - USD ($) shares in Thousands, $ in Thousands			3 Months Ended		9 Months Ended
	Mar. 29, 2018	Mar. 03, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Noncontrolling Interest [Line Items]
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest			$ (2)	$ 5	$ (66)	$ 79
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest			$ 429	$ 955	74	1,185
Adjustments to Additional Paid-In-Capital					(42,555)
Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Issuance of Noncontrolling Interest					1,165	8,279
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests					1,011	$ 261
LP Unit Purchases [Member]
Noncontrolling Interest [Line Items]
Evercore LP Units Purchased or Converted into Class A Common Stock, Shares						32
Noncontrolling Interest, Period Increase (Decrease)						$ 2,523
Class A LP Units [Member]
Noncontrolling Interest [Line Items]
Grant of LP Units (in units)						111
Class A LP Units [Member] | Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Issuance of Noncontrolling Interest						$ 8,169
PCA [Member]
Noncontrolling Interest [Line Items]
Issuance of Noncontrolling Interest					770
Purchase of Noncontrolling Interest (as a percent)	15.00%	13.00%
Purchase of Noncontrolling Interest	$ 25,525	$ 7,071
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests					298	261
Adjustments to Additional Paid-In-Capital					$ 25,227	$ 6,810

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Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities, attributable to noncontrolling interest. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to noncontrolling interests.

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