Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash Flows From Operating Activities
Net Income	$ 353,661	$ 442,851	$ 179,207
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Net (Gains) Losses on Investments, Investment Securities and Contingent Consideration	(13,750)	10,718	(32)
Equity Method Investments	403	1,352	(513)
Equity-Based and Other Deferred Compensation	360,341	293,507	230,268
Impairment of Goodwill and Equity Method Investments	2,921	0	21,507
Gain on Sale of Institutional Trust and Independent Fiduciary business of ETC	0	0	(7,808)
Noncash Lease Expense	29,259	0	0
Depreciation, Amortization and Accretion	35,730	29,374	26,032
Bad Debt Expense	10,451	3,365	2,579
Adjustment to Tax Receivable Agreement	0	0	(77,535)
Release of Cumulative Foreign Exchange Losses	0	0	16,266
Deferred Taxes	(10,503)	(3,981)	148,320
Decrease (Increase) in Operating Assets:
Investment Securities	(491)	(546)	865
Financial Instruments Owned and Pledged as Collateral at Fair Value	10,629	(2,961)	35
Securities Purchased Under Agreements to Resell	(10,541)	8,166	2,642
Accounts Receivable	5,241	(130,956)	47,120
Receivable from Employees and Related Parties	1,450	(6,849)	(2,188)
Other Assets	(58,962)	(21,830)	(10,982)
(Decrease) Increase in Operating Liabilities:
Accrued Compensation and Benefits	(180,767)	208,088	(25,892)
Accounts Payable and Accrued Expenses	(745)	5,496	1,149
Securities Sold Under Agreements to Repurchase	(115)	(5,183)	(2,701)
Payables to Employees and Related Parties	(599)	4,387	3,217
Taxes Payable	(30,221)	16,099	(10,849)
Other Liabilities	1,305	(1,523)	(33,471)
Net Cash Provided by Operating Activities	504,697	849,574	507,236
Cash Flows From Investing Activities
Investments Purchased	(3,843)	(95)	(997)
Distributions of Private Equity Investments	1,893	2,143	2,072
Investment Securities:
Proceeds from Sales and Maturities	510,151	191,779	45,642
Purchases	(698,995)	(336,596)	(40,995)
Maturity of Certificates of Deposit	100,000	63,527	0
Purchase of Certificates of Deposit	(211,861)	(100,000)	(63,417)
Purchase of Furniture, Equipment and Leasehold Improvements	(70,816)	(33,324)	(31,300)
Proceeds from Sale of Business	0	0	34,354
Net Cash Provided by (Used in) Investing Activities	(373,471)	(212,566)	(54,641)
Cash Flows From Financing Activities
Issuance of Noncontrolling Interests	600	1,165	110
Distributions to Noncontrolling Interests	(54,706)	(41,413)	(36,374)
Payments Under Tax Receivable Agreement	(9,490)	(13,345)	(12,381)
Short-Term Borrowings	30,000	30,000	30,000
Repayment of Short-Term Borrowings	(30,000)	(30,000)	(30,000)
Repayment of Subordinated Borrowings	0	(6,799)	(9,751)
Issuance of Notes Payable	205,718	0	0
Debt Issuance Costs	(2,032)	0	0
Purchase of Treasury Stock and Noncontrolling Interests	(333,296)	(315,233)	(304,313)
Dividends	(96,803)	(77,302)	(56,521)
Net Cash Provided by (Used in) Financing Activities	(290,009)	(452,927)	(419,230)
Effect of Exchange Rate Changes on Cash	2,573	(1,370)	8,383
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	(156,210)	182,711	41,748
Cash, Cash Equivalents and Restricted Cash-Beginning of Period	800,096	617,385	575,637
Cash, Cash Equivalents and Restricted Cash-End of Period	643,886	800,096	617,385
SUPPLEMENTAL CASH FLOW DISCLOSURE
Payments for Interest	16,405	17,818	19,471
Payments for Income Taxes	155,478	86,232	128,689
Accrued Dividends	14,642	12,288	9,815
Purchase of Noncontrolling Interest	2,701	0	0
Settlement of Contingent Consideration	0	0	10,780
Evercore Trust Company [Member]
SUPPLEMENTAL CASH FLOW DISCLOSURE
Institutional Trust and Independent Fiduciary business of ETC Assets Deconsolidated	0	0	81
Institutional Trust and Independent Fiduciary business of ETC Liabilities Deconsolidated	0	0	1,489
Decrease in Goodwill from sale of Institutional Trust and Independent Fiduciary business of ETC	$ 0	$ 0	$ 28,442