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Common Stock (Tables) | 12 Months Ended
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Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of reconciliation of changes in common shares issued | A reconciliation of the changes in common shares issued is as follows:
| Year ended December 31,
| 2015 |  | 2014
Shares issued at the beginning of the year | 54,633,726 |  |  | 58,265,911 |
Issued in acquisitions | 60,024 |  |  | 99,681 |
Issued in payment of accrued liability | — |  |  | 27,101 |
Issued upon exercise of warrants | — |  |  | 1,277,250 |
Issued as restricted stock award grants | 758,904 |  |  | 525,120 |
Issued upon exercise of stock options | 767,560 |  |  | 311,954 |
Retirement of treasury shares | — |  |  | (5,873,291 | )
Shares issued at the end of the year | 56,220,214 |  |  | 54,633,726 |
Schedule of stock option activity | Stock option activity for the year ended December 31, 2015 is as follows:
Options |  | Shares |  | Weighted-Average Exercise Price |  | Weighted-Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value
Outstanding as of January 1, 2015 |  | 1,544,960 |  |  | $ | 4.81 |  |  |  |  |
Exercised |  | (767,560 | ) |  | 1.79 |  |  |  |  |
Forfeited |  | — |  |  | — |  |  |  |  |
Expired |  | — |  |  | — |  |  |  |  |
Outstanding as of December 31, 2015 |  | 777,400 |  |  | $ | 7.80 |  |  | 1.31 |  | $ | 2,828,951 |
Vested or expected to vest at |  |  |  |  |  |  |  |
December 31, 2015 |  | 777,400 |  |  | $ | 7.80 |  |  | 1.31 |  | $ | 2,828,951 |
Options exercisable as of |  |  |  |  |  |  |  |
December 31, 2015 |  | 777,400 |  |  | $ | 7.80 |  |  | 1.31 |  | $ | 2,828,951 |
Schedule of restricted stock activity | Restricted stock share activity for the year ended December 31, 2015 is as follows:
Restricted Stock Shares |  | Shares |  | Weighted- Average Fair Value at Date of Grant
Non-vested at January 1, 2015 |  | 826,518 |  |  | $ | 18.78 |
Granted |  | 406,650 |  |  | 16.15 |
RSAs converted from 2014 restricted stock units |  | 352,254 |  |  | 24.66 |
Vested |  | (653,211 | ) |  | 20.90 |
Forfeited |  | (32,995 | ) |  | 22.72 |
Non-vested at December 31, 2015 |  | 899,216 |  |  | $ | 18.21 |
Schedule of restricted stock unit activity | Restricted stock unit share activity for the year ended December 31, 2015 is as follows:
Restricted Stock Unit Shares |  | Shares |  | Weighted- Average Fair Value at Date of Grant
RSU share equivalents at January 1, 2015 |  | 352,254 |  |  | $ | 24.66 |
2014 RSUs converted to RSAs in 2015 |  | (352,254 | ) |  | 24.66 |
Share equivalents earned in 2015 |  | 386,049 |  |  | 21.96 |
RSU share equivalents at December 31, 2015 |  | 386,049 |  |  | $ | 21.96 |

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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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