Share-Based and Other Deferred Compensation (Details) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended | 23 Months Ended |
Nov. 30, 2017USD ($)shares | Jul. 31, 2017voteshares | Nov. 30, 2016USD ($)trancheshares | Mar. 31, 2018USD ($)payment_installment$ / sharesshares | Mar. 31, 2017USD ($)shares | Dec. 31, 2018USD ($) | Dec. 31, 2017USD ($) | Dec. 31, 2016USD ($)shares | Dec. 31, 2014shares | Feb. 15, 2020shares |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Deferred Compensation Arrangement Compensation Expense | | | | $ 12,591 | $ 4,398 | | | | | |
Severance Costs | | | | 3,418 | 609 | | | | | |
Cash Payments Related to Separation Benefits | | | | $ 2,875 | $ 111 | | | | | |
LP Units [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Limited Partnership Units Convertible Conversion Ratio | | | 1 | 1 | | | | | | |
2016 Stock Incentive Plan [Member] | Class A [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Number of Additional Shares Authorized | shares | | | | | | | | 10,000,000 | | |
Number of Shares Available for Grant | shares | | | | 5,484,000 | 7,455,000 | | | | | |
Long Term Incentive Plan [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Deferred Compensation Arrangement Compensation Expense | | | | $ 7,127 | $ 5,858 | | | | | |
Long Term Incentive Plan Performance Period (in years) | | | | 4 years | | | | | | |
Deferred Compensation Arrangement with Individual, Recorded Liability | | | | $ 49,290 | | | | | | |
Number of Payment Installments | payment_installment | | | | 3 | | | | | | |
Deferred Compensation Arrangement with Individual, Distribution Paid | | | | | 19,401 | | | | | |
Long Term Incentive Plan [Member] | Second Installment [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Deferred Compensation Arrangement with Individual, Distribution Paid | | | | $ 4,532 | | | | | | |
Class G LP Interests [Member] | Minimum [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Management Basis EBIT Margin (as a percent) | | | | 12.00% | | | | | | |
Class G LP Interests [Member] | Maximum [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Management Basis EBIT Margin (as a percent) | | | | 16.00% | | | | | | |
Class H LP Interests [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Class H Interests Performance Period (in years) | | | | 3 years | | | | | | |
Class H LP Interests [Member] | Minimum [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Management Basis EBIT Margin (as a percent) | | | | 7.00% | | | | | | |
Management Basis EBIT | | | | $ 8,000 | | | | | | |
Class H LP Interests [Member] | Maximum [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Management Basis EBIT Margin (as a percent) | | | | 17.00% | | | | | | |
Management Basis EBIT | | | | $ 48,000 | | | | | | |
Class I-P Units [Member] | Board of Directors Chairman [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Compensation Expense | | | | 1,139 | 1,139 | | | | | |
Grant of I-P Units (in units) | shares | | | 400,000 | | | | | | | |
Retirement Notice Requirement | | | 1 year | | | | | | | |
Number of Tranches of Class I-P Units | tranche | | | 2 | | | | | | | |
Number of Class I-P Units in Each Tranche (in units) | shares | | | 200,000 | | | | | | | |
Number of Consecutive Trading Days Required for Class I-P Units to Exceed Thresholds | | | 20 days | | | | | | | |
Grant of I-P Units, Fair Value of Award | | | $ 24,412 | | | | | | | |
Class K-P Units [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Compensation Expense | | | | 296 | | | | | | |
Limited Partnership Units Convertible Conversion Ratio | 1 | | | | | | | | | |
Grant of K-P Units (in units) | shares | 64,000 | | | | | | | | | |
K-P Units to be Granted Upon Achievement of Benchmarks (in units) | shares | 16,000 | | | | | | | | | |
Grant of K-P Units, Fair Value of Award | $ 5,000 | | | | | | | | | |
Restricted Stock Units (RSUs) [Member] | 2006 and 2016 Stock Incentive Plans [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Compensation Expense | | | | $ 42,731 | 41,044 | | | | | |
Shares Vested During Period (in shares) | shares | | | | 2,332,000 | | | | | | |
Shares Forfeited During Period (in shares) | shares | | | | 16,000 | | | | | | |
Restricted Stock Units (RSUs) [Member] | 2016 Stock Incentive Plan [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Shares Issued During Period (in shares) | shares | | | | 1,779,000 | | | | | | |
Restricted Stock Units (RSUs) [Member] | 2016 Stock Incentive Plan [Member] | Minimum [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares | | | | $ 89.98 | | | | | | |
Restricted Stock Units (RSUs) [Member] | 2016 Stock Incentive Plan [Member] | Maximum [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares | | | | $ 94.35 | | | | | | |
Deferred Cash Compensation Program [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Deferred Compensation, Vesting Period (in years) | | | | 4 years | | | | | | |
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount | | | | $ 82,592 | | | $ 3,750 | $ 41,147 | | |
Restricted Cash Award [Member] | Board of Directors Chairman [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Retirement Notice Requirement | | | 6 months | | | | | | | |
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount | | | $ 35,000 | | | | | | | |
Deferred Compensation Arrangement With Individual Cash Award Tranche One Vesting Amount | | | 11,000 | | | | | | | |
Deferred Compensation Arrangement With Individual Cash Award Tranche Two Vesting Amount | | | $ 6,000 | | | | | | | |
Awards Vesting Period | | | 4 years | | | | | | | |
Restricted Cash Award [Member] | Minimum [Member] | Board of Directors Chairman [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount | | | $ 8,750 | | | | | | | |
Restricted Cash Award [Member] | Maximum [Member] | Board of Directors Chairman [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount | | | $ 35,000 | | | | | | | |
Other Deferred Cash [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount | | | | | | | $ 29,500 | | | |
Awards Vesting Period | | | | | | | 5 years | | | |
Employee Loans [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Deferred Compensation Arrangement Compensation Expense | | | | 3,322 | $ 4,172 | | | | | |
Deferred Compensation Arrangement with Individual, Recorded Liability | | | | $ 37,394 | | | | | | |
Requisite Service Period (in years) | | | | 1 year | | | | | | |
Maximum Contractual Term (in years) | | | | 5 years | | | | | | |
Evercore ISI [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Management Basis EBIT Margin (as a percent) | | | | | | | 11.70% | | | |
Management Basis EBIT | | | | | | | $ 26,904 | | | |
Evercore ISI [Member] | Scenario, Forecast [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Management Basis EBIT Margin (as a percent) | | | | | | 14.00% | | | | |
Management Basis EBIT | | | | | | $ 34,357 | | | | |
Evercore ISI [Member] | Class E LP Units [Member] | Acquisition Related [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Units Amended In Period (in units) | shares | | | | | 19,000 | | | | | |
Evercore ISI [Member] | Class E LP Units [Member] | Acquisition Related [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Compensation Expense | | | | | $ 4,756 | | | | | |
Evercore ISI [Member] | Class G LP Interests [Member] | Acquisition Related [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Units Amended In Period (in units) | shares | | | | | 14,000 | | | | | |
Evercore ISI [Member] | Class H LP Interests [Member] | Acquisition Related [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Number of Units Outstanding (in units) | shares | | 4,148,000 | | | | | | | | |
Units Amended In Period (in units) | shares | | | | | 162,000 | | | | | |
Evercore ISI [Member] | Class H LP Interests [Member] | Acquisition Related [Member] | Scenario, Forecast [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Interests That Would Vest Related To Acquisition Related Awards Based On Current Performance (in units) | shares | | | | | | | | | | 2,005,000 |
Evercore ISI [Member] | Class J LP Units [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Common Stock, Number of Votes | vote | | 1 | | | | | | | | |
Evercore ISI [Member] | Class J LP Units [Member] | Class B [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Stock Issued During Period, Shares, New Issues | shares | | 1 | | | | | | | | |
Evercore ISI [Member] | Class J LP Units [Member] | Acquisition Related [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Compensation Expense | | | | $ 3,872 | | | | | | |
Evercore ISI [Member] | Class G And H Interests [Member] | Acquisition Related [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Compensation Expense | | | | | $ (26,224) | | | | | |
Evercore ISI [Member] | Vested LP Units [Member] | Class E LP Units [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Grant of LP Units (in units) | shares | | | | | | | | | 710,000 | |
Evercore ISI [Member] | Vested LP Units [Member] | Class G LP Interests [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Grant of LP Units (in units) | shares | | | | | | | | | 538,000 | |
Evercore ISI [Member] | Vested LP Units [Member] | Class H LP Interests [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Grant of LP Units (in units) | shares | | | | | | | | | 2,044,000 | |
Evercore ISI [Member] | Vested LP Units [Member] | Class J LP Units [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Grant of LP Units (in units) | shares | | 1,012,000 | | | | | | | | |
Evercore ISI [Member] | Vested LP Units [Member] | Class J LP Units [Member] | Subject to Continued Employment [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Grant of LP Units (in units) | shares | | 963,000 | | | | | | | | |
Evercore ISI [Member] | Unvested LP Units [Member] | Class E LP Units [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Grant of LP Units (in units) | shares | | | | | | | | | 710,000 | |
Evercore ISI [Member] | Unvested LP Units [Member] | Class G LP Interests [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Grant of LP Units (in units) | shares | | | | | | | | | 540,000 | |
Evercore ISI [Member] | Unvested LP Units [Member] | Class H LP Interests [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Grant of LP Units (in units) | shares | | | | | | | | | 2,051,000 | |
Evercore ISI [Member] | Unvested LP Units [Member] | Class J LP Units [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Grant of LP Units (in units) | shares | | 938,000 | | | | | | | | |
Evercore ISI [Member] | Modified LP Units and Interests [Member] | Acquisition Related [Member] | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | |
Compensation Expense | | | | | (3,022) | | | | | |
Amended Grant Date Weighted Average Fair Value, Granted | | | | | $ 14,891 | | | | | |