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Share-based Compensation | 3 Months Ended
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Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Share-based Compensation | Share-based Compensation Share-based compensation prior to the Company’s Reorganization completed on April 15, 2015 and IPO commenced on April 16, 2015: During the period prior to the Company's Reorganization and IPO, Class A-2 profits interests were issued to Employee Holdco , a holding company that holds the interests on behalf of certain key employees or stakeholders. During the three months ended March 31, 2018 and 2017, the Company recorded expense relating to non-voting common interest units, which were originally granted as Class A-2 profits interests and were reclassified into non-voting common interest units in connection with the Reorganization Transactions. The non-voting common interest units are subject to the same vesting requirements as the prior Class A-2 profits interests, which were either fully vested upon issuance or vested over a period of up to four years, and in each case are subject to repurchase provisions upon certain termination events. These awards were accounted for as equity awards and were measured at fair value at the date of grant. The Company recognized compensation expense related to the vesting of non-voting common interest units (formerly Class A-2 profits interests) of $0.0 million and $0.2 million for the three months ended March 31, 2018 and 2017, respectively. As of March 31, 2018 and December 31, 2017, total unrecognized share-based compensation expense related to unvested non-voting common interest units (formerly Class A-2 profits interests), was $0.0 million and $0.1 million, respectively; and this amount is expected to be recognized over a weighted average period of 0 and 0.1 years, respectively. Additionally, Class B interests were issued to Employee Holdco on behalf of certain key employees and stakeholders on various dates prior to the IPO. Class B interests were subject to time based vesting over four years and only fully vested upon the consummation of a qualifying capital transaction by the Company, including an IPO. In connection with the Reorganization Transactions, Class B Interests were reclassified into non-voting common interest units. The Company recognized compensation expense in respect of non-voting common interest units (formerly Class B interests) vested of $0 and $0.2 million for the three months ended March 31, 2018 and 2017, respectively. The compensation expense related to non-voting common interest units (formerly Class B interests) was included within charges related to share based compensation at IPO in the condensed consolidated statements of comprehensive income. As of March 31, 2018 and December 31, 2017, total unrecognized share-based compensation expense related to unvested non-voting common interest units (formerly Class B interests) was $0 and $0.1 million, respectively; and this amount is expected to be recognized over a weighted average period of 0 and 0.8 years, respectively. Additionally, in connection with the compensation charges related to non-voting common interest units (formerly Class B interests) mentioned above, the Company capitalized $0.00 million and $0.01 million for the three months ended March 31, 2018 and 2017, respectively. The amortization costs related to these capitalized compensation charges and previously capitalized compensation charges related to East MIP Class B interests and Class B interests were approximately $0.01 million and $0.0 million for the three months ended March 31, 2018 and 2017, respectively. The costs attributable to employees incurred in development of software for internal use were included within charges related to share based compensation at IPO in the condensed consolidated statements of comprehensive income. The fair value of the Class A-2 profit and Class B interest was estimated by the Company using an option pricing methodology based on expected volatility, risk-free rates and expected life. Expected volatility is calculated based on companies in the same peer group as the Company. In connection with the Reorganization Transactions, all Class A-2 profits interests and Class B interests were reclassified into non-voting common interest units. As of March 31, 2018 and December 31, 2017, there were 11,512,297 and 12,301,067 non-voting common interest units outstanding, respectively, and 788,770 and 729,272 non-voting common interest units and corresponding Class C common stock were exchanged into Class A common stock, forfeited or repurchased during the three months ended March 31, 2018 and 2017, respectively. Share-based compensation after the Company’s Reorganization completed on April 15, 2015 and IPO completed on April 16, 2015: Pursuant to 2015 Management Incentive Plan as described in Note 16 "Capital structure", and in connection with the IPO, non-qualified stock options to purchase shares of Class A common stock were granted, each of which vests in equal annual installments over a period of the four years from grant date and expires not later than 10 years from the date of grant. The following table summarizes activity related to stock options for the three months ended March 31, 2018 and 2017:
| Options Outstanding |  | Options Exercisable
| Number of Options |  | Weighted Average Exercise Price Per Share |  | Weighted Average Remaining Contractual Life |  | Number of Options |  | Weighted Average Exercise Price Per Share
December 31, 2016 | 8,234,000 |  |  | $ | 19.00 |  |  | 8.29 |  |  | 2,058,500 |  |  | $ | 19.00 |
Granted | — |  |  | — |  |  | — |  |  | — |  |  | — |
Exercised | — |  |  | — |  |  | — |  |  | — |  |  | — |
Forfeited or expired | (195,000 | ) |  | — |  |  | — |  |  | — |  |  | — |
March 31, 2017 | 8,039,000 |  |  | $ | 19.00 |  |  | 8.05 |  |  | 2,009,750 |  |  | $ | 19.00 |
December 31, 2017 | 7,783,000 |  |  | $ | 19.00 |  |  | 7.29 |  |  | 3,891,500 |  |  | $ | 19.00 |
Granted | — |  |  | — |  |  | — |  |  | — |  |  | — |
Exercised | (732,000 | ) |  | 19.00 |  |  | — |  |  | (732,000 | ) |  | 19.00 |
Forfeited or expired | — |  |  | — |  |  | — |  |  | — |  |  | — |
March 31, 2018 | 7,051,000 |  |  | $ | 19.00 |  |  | 7.05 |  |  | 3,182,000 |  |  | $ | 19.00 |
The expected life has been determined based on an average of vesting and contractual period. The risk-free interest rate was determined based on the yields available on U.S. Treasury zero-coupon issues. The expected stock price volatility was determined based on historical volatilities of comparable companies. The expected dividend yield was determined based on estimated future dividend payments divided by the IPO stock price. The Company recognized $1.4 million and $1.4 million of compensation expense in relation to the stock options issued and outstanding for the three months ended March 31, 2018 and 2017, respectively. As of March 31, 2018 and December 31, 2017, total unrecognized share-based compensation expense related to unvested stock options was $6.1 million and $7.5 million, respectively, and these amounts are to be recognized over a weighted average period of 1.1 and 1.3 years, respectively. Class A common stock and Restricted Stock Units Pursuant to the 2015 Management Incentive Plan as described in Note 16 "Capital structure", subsequent to the IPO, shares of immediately vested Class A common stock and restricted stock units were granted, the latter which vest over a period of up to 4 years. The fair value of the Class A common stock and RSUs was determined based on a volume weighted average price and is being recognized on a straight line basis over the vesting period. For the three months ended March 31, 2018, there were 594,536 shares of immediately vested Class A common stock granted as part of 2017 year-end compensation, with a fair value of $11.3 million which was recorded as an increase to the condensed consolidated statements of changes in equity. In addition, the Company accrued compensation expense of $3.9 million and $4.7 million for the three months ended March 31, 2018 and 2017 related to immediately vested Class A common stock expected to be awarded as part of year-end incentive compensation, which was included in employee compensation and payroll taxes on the condensed consolidated statements of comprehensive income and accounts payable and accrued expenses and other liabilities on the condensed consolidated statements of financial condition. The following table summarizes activity related to the RSUs:
| Number of Shares |  | Weighted Average Fair Value
At December 31, 2016 | 1,573,441 |  |  | $ | 18.28 |
Granted | — |  |  | — |
Forfeited | (95,481 | ) |  | 18.38 |
Vested | — |  |  | — |
At March 31, 2017 | 1,477,960 |  |  | $ | 18.28 |
At December 31, 2017 | 853,047 |  |  | $ | 17.94 |
Granted | 1,044,690 |  |  | 20.64 |
Forfeited | (30,626 | ) |  | 18.52 |
Vested | — |  |  | — |
At March 31, 2018 | 1,867,111 |  |  | $ | 18.85 |
The Company recognized $4.0 million and $2.6 million of compensation expense in relation to the restricted stock units for the three months ended March 31, 2018 and 2017, respectively. As of March 31, 2018 and December 31, 2017, total unrecognized share-based compensation expense related to unvested RSUs was $34.8 million and $14.3 million, respectively, and this amount is to be recognized over a weighted average period of 1.9 and 1.5, respectively.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65895303&loc=d3e17540-113929 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68057994&loc=d3e25284-112666 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 + Details
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