v2.4.1.9

Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity | A summary of stock option activity under the Incentive Plan as of December 31, 2014 and 2013 and changes during the periods then ended are as follows:
|  | Number of Shares |  | Weighted-Average Price/Share |  | Weighted-Average Remaining Contractual Term |  | Aggregate Intrinsic Value
|  |  |  |  |  | (in years) |  |
Outstanding at December 31, 2012 |  | 2,820,619 |  |  | $ | 9.11 |  |  | 8.62 |  | $ | 8,687 |
Granted |  | 1,923,206 |  |  | 19.46 |  |  |  |  |
Exercised |  | (588,769 | ) |  | 8.69 |  |  |  |  |
Cancelled |  | (844,292 | ) |  | (11.16 | ) |  |  |  |
Outstanding at December 31, 2013 |  | 3,310,764 |  |  | $ | 14.67 |  |  | 8.63 |  | $ | 9,717 |
Granted |  | 3,239,740 |  |  | 10.89 |  |  |  |  |
Exercised |  | (60,632 | ) |  | 8.26 |  |  |  |  |
Cancelled |  | (1,050,975 | ) |  | (11.54 | ) |  |  |  |
Outstanding at December 31, 2014 |  | 5,438,897 |  |  | $ | 13.09 |  |  | 8.59 |  | $ | 21 |
Schedule of Share-based Compensation, Activity |
|  | Number of Shares |  | Weighted-Average Price/Share |  | Weighted-Average Remaining Contractual Term |  | Aggregate Intrinsic Value
|  |  |  |  |  | (in years) |  |
Vested and Exercisable at December 31, 2013 |  | 894,813 |  |  | $ | 9.38 |  |  | 7.61 |  | $ | 5,358 |
Unvested at December 31, 2013 |  | 2,415,951 |  |  | 16.63 |  |  | 7.91 |  |
Vested and Exercisable at December 31, 2014 |  | 1,248,711 |  |  | $ | 12.97 |  |  | 7.23 |  | $ | — |
Unvested at December 31, 2014 |  | 4,190,186 |  |  | 13.13 |  |  | 9.04 |  |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The fair value of awards granted is estimated at the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions:
Year of Grant |  | Risk-Free Interest Rate |  | Dividend Yield |  | Expected Term |  | Volatility Factor
|  |  |  |  |  | (in years) |  |
2012 |  | 0.71% |  | 0% |  | 4.40 |  | 60.0%
2013 |  | 1.02% |  | 0% |  | 4.90 |  | 57.0%
2014 |  | 1.67% |  | 0% |  | 5.00 |  | 53.0%

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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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