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Percentage Of Earnings Deferred Into Company Stock Units

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Percentage Of Earnings Deferred Into Company Stock Units Company Match

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- Definition

Percentage Of Earnings Deferred Into Company Stock Units Deferred In Mutual Funds

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- Definition

Percentage Of Incentive Compensation Deferred Into Company Stock Units

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- Definition

Restricted stock or unit expense.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

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- Definition

Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

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The amount of plan compensation cost recognized during the period.

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Sum of the carrying amounts as of the balance sheet date of all investments.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, 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 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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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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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

Number of options outstanding, including both vested and non-vested options.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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Employee Incentive, Deferred Compensation, And Retirement Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares authorized to be granted	3,800,000	5,100,000
Stock-based compensation	$ 94,006,000	$ 137,447,000	$ 40,747,000
Total intrinsic value of options exercised	1,600,000	2,800,000	19,200,000
Cash proceeds from the exercise of stock options	300,000	3,600,000	4,200,000
Tax benefits realized from the exercise of stock options	500,000	1,100,000	7,500,000
Options outstanding under the plan	126,000	160,000
Investments, at fair value	210,255,000us-gaap_Investments	217,228,000us-gaap_Investments
Deferred compensation liability	15,700,000	14,300,000
Contributions to the Profit Sharing Plan	4,900,000	6,400,000	3,700,000
ESOP compensation expense		400,000	1,700,000
KBW [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards issued as retention	30,600,000
Knight Capital Fixed Income Business [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards issued as retention	20,100,000
Incentive Stock Award Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	(118,400,000)	131,800,000	51,400,000
Tax benefit related to stock-based compensation recognized in shareholders' equity	19,900,000	12,000,000	16,700,000
Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock units outstanding	18,400,000
Unrecognized compensation expense related to non-vested options	314,900,000
Weighted-average period, compensation cost expected to recognized, in years	2 years 7 months 6 days
Unvested stock units outstanding	11,404,000	8,844,000
SWAP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Elective deferrals vested percentage	100.00%
Percentage of incentive compensation deferred into company stock units	15.00%
Percentage of earnings deferred into company stock units	4.00%
Percentage of earnings deferred into company stock units, Company match	25.00%
Percentage of earnings deferred into mutual funds	2.00%
Mutual Funds [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Investments, at fair value	$ 18,100,000	$ 17,000,000
Maximum [Member] \| Incentive Stock Award Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	8 years
Maximum [Member] \| Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	8 years
Maximum [Member] \| Deferred Compensation Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	8 years
Maximum [Member] \| SWAP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	7 years
Minimum [Member] \| Incentive Stock Award Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	3 years
Minimum [Member] \| Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	3 years
Minimum [Member] \| Deferred Compensation Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	5 years
Minimum [Member] \| SWAP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years	3 years