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STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Costs Related to Stock Compensation Plans | The following costs related to the Company’s stock compensation plans were included in the consolidated statements of income and comprehensive income:
|  | For the Years Ended December 31,
|  | 2014 |  | 2013 |  | 2012
Cost of revenues |  | $ | 8,648 |  |  | $ | 4,823 |  |  | $ | 2,809 |
Selling, general and administrative expenses |  | 15,972 |  |  | 8,327 |  |  | 4,017 |
Total |  | $ | 24,620 |  |  | $ | 13,150 |  |  | $ | 6,826 |
Stock Option Activity | Stock option activity under the Company’s plans is set forth below:
| Number of Options |  | Weighted Average Exercise Price |  | Aggregate Intrinsic Value
Options outstanding at January 1, 2012 | 6,595,136 |  |  | $ | 4.65 |  |  | $ | 48,447 |
Options granted | 1,443,810 |  |  | 16.80 |  |  | 1,877 |
Options exercised | (1,552,742 | ) |  | 3.53 |  |  | (22,623 | )
Options forfeited/cancelled | (189,495 | ) |  | 11.35 |  |  | (1,279 | )
Options outstanding at December 31, 2012 | 6,296,709 |  |  | $ | 7.51 |  |  | $ | 66,682 |
Options granted | 1,987,952 |  |  | 23.60 |  |  | 22,543 |
Options exercised | (2,156,898 | ) |  | 4.31 |  |  | (66,066 | )
Options forfeited/cancelled | (304,227 | ) |  | 11.50 |  |  | (7,131 | )
Options outstanding at December 31, 2013 | 5,823,536 |  |  | $ | 13.99 |  |  | $ | 122,003 |
Options granted | 2,400,500 |  |  | 32.51 |  |  | 36,584 |
Options exercised | (1,171,097 | ) |  | 9.05 |  |  | (45,321 | )
Options forfeited/cancelled | (214,193 | ) |  | 25.33 |  |  | (4,802 | )
Options outstanding at December 31, 2014 | 6,838,746 |  |  | $ | 20.98 |  |  | $ | 183,073 |
Options vested and exercisable at December 31, 2014 | 2,406,016 |  |  | $ | 9.83 |  |  | $ | 91,236 |
Options expected to vest | 4,074,226 |  |  | $ | 26.82 |  |  | $ | 85,274 |
Service-based Awards Activity | Summarized activity related to the Company’s service-based awards for the years ended December 31, 2014, 2013 and 2012 was as follows:
| Number of Shares |  | Weighted Average Grant Date Fair Value Per Share
Unvested service-based awards outstanding at January 1, 2012 | — |  |  | $ | — |
Awards granted | 757,272 |  |  | 17.15 |
Awards vested | (97,400 | ) |  | 12.00 |
Unvested service-based awards outstanding at December 31, 2012 | 659,872 |  |  | $ | 17.92 |
Awards granted | 15,524 |  |  | 23.69 |
Awards vested | (330,468 | ) |  | 17.33 |
Unvested service-based awards outstanding at December 31, 2013 | 344,928 |  |  | $ | 18.74 |
Awards granted | 523,220 |  |  | 40.41 |
Awards vested | (217,668 | ) |  | 17.84 |
Awards forfeited/cancelled | (17,038 | ) |  | 21.14 |
Unvested service-based awards outstanding at December 31, 2014 | 633,442 |  |  | $ | 36.88 |
Performance-based Awards Activity | Summarized activity related to the Company’s performance-based awards for the years ended December 31, 2014, was as follows:
| Number of Shares |  | Weighted Average Grant Date Fair Value Per Share
Unvested performance-based awards outstanding at December 31, 2013 | — |  |  | $ | — |
Awards granted | 387,058 |  |  | 38.18 |
Awards vested | — |  |  | — |
Awards forfeited/cancelled | (2,550 | ) |  | 36.57 |
Changes in the number of awards expected to be delivered | (12,998 | ) |  | 5.47 |
Unvested performance-based awards outstanding at December 31, 2014 | 371,510 |  |  | $ | 39.34 |

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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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