Long-Term Incentive Compensation Expense, Impact of Change in Value of Investments

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Amount of commitment made to pay deferred cash remuneration.

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The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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Amount of expense for employee benefit and equity-based compensation.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of realized and unrealized gain (loss) on investment.

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Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit.

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Amount of the liabilities for deferred compensation arrangements classified as other.

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Amount of expense for salary and wage arising from service rendered by nonofficer and officer employees. Excludes allocated cost, labor-related nonsalary expense, and direct and overhead labor cost included in cost of good and service sold.

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Amount of noncash expense for share-based payment arrangement.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Aggregate value of stock related to Restricted Stock Awards issued during the period.

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Compensation and Benefits - Components of expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 35,800	$ 21,000	$ 15,900
Salaries, incentive compensation and benefits	516,931	399,325	358,339
Restricted share-based award compensation expense	39,236	36,493	42,117
Long-term incentive compensation expense	46,123	36,493	42,117
Total compensation and benefits	$ 563,054	$ 435,818	400,456
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	3,881,524
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		60,000
Stock Issued During Period, Value, Restricted Stock Award, Gross	$ 0	$ 0	0
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount	35,000
Deferred Bonus
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense	6,887	$ 0	$ 0
2021 Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Value, Restricted Stock Award, Gross	44,100
Unvested restricted share-based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 76,500
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	3 years 3 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period	5 years
Granted in Period, Number of Shares	741,555	919,455	963,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	5,245,394	5,293,642	5,005,422	4,678,457
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 5,200
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	2 years 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period	3 years
Granted in Period, Number of Shares	75,230	60,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	135,230	60,000	0
Performance Shares \| Pro Forma
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	135,233
Share-based Payment Arrangement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted in Period, Number of Shares	740,249
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted in Period, Number of Shares	1,306
Long-Term Cash Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other Deferred Compensation Arrangements, Liability, Current and Noncurrent	$ 6,900
Long-Term Cash Awards \| Operating Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long-Term Incentive Compensation Expense	520	$ 0	$ 0
Long-Term Cash Awards \| Nonoperating Income (Expense)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net investment gain (loss) of consolidated investment products	$ 2,717	$ 0	$ 0