Stock-Based Compensation Plans	6 Months Ended
Jun. 30, 2016
Share-based Compensation [Abstract]
Stock-Based Compensation Plans	Stock-Based Compensation Plans Restricted Stock and Restricted Stock Units. Restricted stock and restricted stock units (“RSUs”) may be granted to new employees as “sign-on” awards, to existing employees as “retention” awards and to certain executive officers as awards for multiple years. Sign-on and retention awards are generally subject to annual ratable vesting over a four-year service period and are amortized as compensation expense on a straight line basis over the related four years. Restricted stock and RSUs are granted to certain senior executives with market, performance and service conditions. Market conditions are incorporated into the grant-date fair value of senior executives awards using a Monte Carlo valuation model. Compensation expense for awards with market conditions is recognized over the service period and is not reversed if the market condition is not met. Awards with performance conditions are amortized over the service period if it is determined that it is probable that the performance condition will be achieved. Awards granted to senior executives related to the 2015 fiscal year did not meet performance targets, and as a result, compensation expense has been adjusted to reflect the reduced number of shares that have vested. Senior Executive Compensation Plan. On February 19, 2016, the Compensation Committee of our Board of Directors approved an executive compensation plan for our CEO and our President (together, our "Senior Executives") that will be based on performance metrics achieved over a three-year period from 2016 through 2018. The Compensation Committee eliminated cash incentive bonuses for 2016 and 100% of each of our CEO and President's compensation beyond their base salaries will be composed entirely of performance based RSUs that will vest at the end of 2018 if certain performance criteria are met. Any vested RSUs will be subject to a post-vesting, three-year holding period such that no vested RSUs can be sold or transferred until the first quarter of 2022. Performance-vesting of the award will be based equally on the compound annual growth rates of Leucadia's total shareholder return ("TSR"), which will be measured from the December 31, 2015 stock price of $17.39, and Leucadia's Return on Tangible Deployable Equity ("ROTDE"), the annual, two- and three-year results of which will be used to determine vesting. TSR is based on annualized rate of return reflecting price appreciation plus reinvestment of dividends and distributions to shareholders. ROTDE is net income adjusted for amortization of intangible assets divided by tangible book value at the beginning of year adjusted for intangible assets and deferred tax assets. If Leucadia's TSR and ROTDE annual compound growth rates are less than 4%, our Senior Executives will not receive any incentive compensation. If Leucadia's TSR and ROTDE grow between 4% and 8% on a compounded basis over the three-year measurement period, each of our Senior Executives will be eligible to receive between 846,882 and 1,693,766 RSUs. If TSR and ROTDE growth rates are greater than 8%, our Senior Executives are eligible to receive up to 50% additional incentive compensation on a pro rata basis up to 12% growth rates. When determining whether RSUs will vest, the calculation will be weighted equally between TSR and ROTDE. If TSR growth was below minimum thresholds, but ROTDE growth was above minimum thresholds, our Senior Executives would still be eligible to receive some number of vested RSUs based on ROTDE growth. The TSR award contains a market condition and compensation expense is recognized over the service period and will not be reversed if the market condition is not met. The ROTDE award contains a performance condition and compensation expense is recognized over the service period if it is determined that it is probable that the performance condition will be achieved. Former Stock-Based Compensation Plans. Prior to the acquisition of Jefferies, we had two share-based compensation plans: a fixed stock option plan and a senior executive warrant plan. The fixed stock option plan provided for the issuance of stock options and stock appreciation rights to non-employee directors and certain employees at not less than the fair market value of the underlying stock at the date of grant. Options granted to employees under this plan were intended to qualify as incentive stock options to the extent permitted under the Internal Revenue Code and became exercisable in five equal annual installments starting one year from date of grant. Options granted to non-employee directors became exercisable in four equal annual installments starting one year from date of grant. No stock appreciation rights have been granted. In March 2014, we ceased issuing options and rights under our option plan. No shares remain available for future issuances under our option plan or warrant plan. At June 30, 2016, 661,272 of our common shares were reserved for stock options. Senior Executive Warrant Plan. The warrants to purchase 2,000,000 common shares that were granted in 2011 to each of our then Chairman and then President expired during the first quarter of 2016. Stock-Based Compensation Expense. Compensation and benefits expense included $9.1 million and $20.1 million for the three months ended June 30, 2016 and 2015, respectively, and $16.1 million and $52.9 million for the six months ended June 30, 2016 and 2015, respectively, for share-based compensation expense relating to grants made under our share-based compensation plans. Total compensation cost includes the amortization of sign-on, retention and senior executive awards, less forfeitures and clawbacks. The total tax benefit recognized in results of operations related to share-based compensation expenses was $3.3 million and $7.3 million for the three months ended June 30, 2016 and 2015, respectively, and $5.9 million and $19.2 million for the six months ended June 30, 2016 and 2015, respectively. As of June 30, 2016, total unrecognized compensation cost related to nonvested share-based compensation plans was $58.5 million; this cost is expected to be recognized over a weighted-average period of 1.8 years. The net tax detriment related to share-based compensation plans recognized in additional paid-in capital was $4.2 million and $5.5 million during the six months ended June 30, 2016 and 2015, respectively, and was not significant during the three months ended June 30, 2016 and 2015. Cash flows resulting from tax deductions in excess of the grant date fair value of share-based awards are included in cash flows from financing activities; accordingly, we reflected the excess tax benefit related to share-based compensation in cash flows from financing activities. Such amounts for the three and six months ended June 30, 2016 and 2015 were not significant. At June 30, 2016, there were 1,568,000 shares of restricted stock outstanding with future service required, 3,473,000 RSUs outstanding with future service required, 10,941,000 RSUs outstanding with no future service required and 787,000 shares issuable under other plans. Excluding shares issuable pursuant to outstanding stock options, the maximum potential increase to common shares outstanding resulting from these outstanding awards is 15,201,000.

Stock-Based Compensation Plans

Restricted Stock and Restricted Stock Units. Restricted stock and restricted stock units (“RSUs”) may be granted to new employees as “sign-on” awards, to existing employees as “retention” awards and to certain executive officers as awards for multiple years. Sign-on and retention awards are generally subject to annual ratable vesting over a four-year service period and are amortized as compensation expense on a straight line basis over the related four years. Restricted stock and RSUs are granted to certain senior executives with market, performance and service conditions. Market conditions are incorporated into the grant-date fair value of senior executives awards using a Monte Carlo valuation model. Compensation expense for awards with market conditions is recognized over the service period and is not reversed if the market condition is not met. Awards with performance conditions are amortized over the service period if it is determined that it is probable that the performance condition will be achieved. Awards granted to senior executives related to the 2015 fiscal year did not meet performance targets, and as a result, compensation expense has been adjusted to reflect the reduced number of shares that have vested.

Senior Executive Compensation Plan. On February 19, 2016, the Compensation Committee of our Board of Directors approved an executive compensation plan for our CEO and our President (together, our "Senior Executives") that will be based on performance metrics achieved over a three-year period from 2016 through 2018. The Compensation Committee eliminated cash incentive bonuses for 2016 and 100% of each of our CEO and President's compensation beyond their base salaries will be composed entirely of performance based RSUs that will vest at the end of 2018 if certain performance criteria are met. Any vested RSUs will be subject to a post-vesting, three-year holding period such that no vested RSUs can be sold or transferred until the first quarter of 2022.

Performance-vesting of the award will be based equally on the compound annual growth rates of Leucadia's total shareholder return ("TSR"), which will be measured from the December 31, 2015 stock price of $17.39, and Leucadia's Return on Tangible Deployable Equity ("ROTDE"), the annual, two- and three-year results of which will be used to determine vesting. TSR is based on annualized rate of return reflecting price appreciation plus reinvestment of dividends and distributions to shareholders. ROTDE is net income adjusted for amortization of intangible assets divided by tangible book value at the beginning of year adjusted for intangible assets and deferred tax assets.

If Leucadia's TSR and ROTDE annual compound growth rates are less than 4%, our Senior Executives will not receive any incentive compensation. If Leucadia's TSR and ROTDE grow between 4% and 8% on a compounded basis over the three-year measurement period, each of our Senior Executives will be eligible to receive between 846,882 and 1,693,766 RSUs. If TSR and ROTDE growth rates are greater than 8%, our Senior Executives are eligible to receive up to 50% additional incentive compensation on a pro rata basis up to 12% growth rates. When determining whether RSUs will vest, the calculation will be weighted equally between TSR and ROTDE. If TSR growth was below minimum thresholds, but ROTDE growth was above minimum thresholds, our Senior Executives would still be eligible to receive some number of vested RSUs based on ROTDE growth. The TSR award contains a market condition and compensation expense is recognized over the service period and will not be reversed if the market condition is not met. The ROTDE award contains a performance condition and compensation expense is recognized over the service period if it is determined that it is probable that the performance condition will be achieved.

Former Stock-Based Compensation Plans. Prior to the acquisition of Jefferies, we had two share-based compensation plans: a fixed stock option plan and a senior executive warrant plan. The fixed stock option plan provided for the issuance of stock options and stock appreciation rights to non-employee directors and certain employees at not less than the fair market value of the underlying stock at the date of grant. Options granted to employees under this plan were intended to qualify as incentive stock options to the extent permitted under the Internal Revenue Code and became exercisable in five equal annual installments starting one year from date of grant. Options granted to non-employee directors became exercisable in four equal annual installments starting one year from date of grant. No stock appreciation rights have been granted. In March 2014, we ceased issuing options and rights under our option plan. No shares remain available for future issuances under our option plan or warrant plan. At June 30, 2016, 661,272 of our common shares were reserved for stock options.

Senior Executive Warrant Plan. The warrants to purchase 2,000,000 common shares that were granted in 2011 to each of our then Chairman and then President expired during the first quarter of 2016.

Stock-Based Compensation Expense. Compensation and benefits expense included $9.1 million and $20.1 million for the three months ended June 30, 2016 and 2015, respectively, and $16.1 million and $52.9 million for the six months ended June 30, 2016 and 2015, respectively, for share-based compensation expense relating to grants made under our share-based compensation plans. Total compensation cost includes the amortization of sign-on, retention and senior executive awards, less forfeitures and clawbacks. The total tax benefit recognized in results of operations related to share-based compensation expenses was $3.3 million and $7.3 million for the three months ended June 30, 2016 and 2015, respectively, and $5.9 million and $19.2 million for the six months ended June 30, 2016 and 2015, respectively. As of June 30, 2016, total unrecognized compensation cost related to nonvested share-based compensation plans was $58.5 million; this cost is expected to be recognized over a weighted-average period of 1.8 years.

The net tax detriment related to share-based compensation plans recognized in additional paid-in capital was $4.2 million and $5.5 million during the six months ended June 30, 2016 and 2015, respectively, and was not significant during the three months ended June 30, 2016 and 2015. Cash flows resulting from tax deductions in excess of the grant date fair value of share-based awards are included in cash flows from financing activities; accordingly, we reflected the excess tax benefit related to share-based compensation in cash flows from financing activities. Such amounts for the three and six months ended June 30, 2016 and 2015 were not significant.

At June 30, 2016, there were 1,568,000 shares of restricted stock outstanding with future service required, 3,473,000 RSUs outstanding with future service required, 10,941,000 RSUs outstanding with no future service required and 787,000 shares issuable under other plans. Excluding shares issuable pursuant to outstanding stock options, the maximum potential increase to common shares outstanding resulting from these outstanding awards is 15,201,000.