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Share-Based Payments (Tables) | 12 Months Ended
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Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Grants, Exchanges and Forfeitures of Restricted Stock and RSUs | The following table summarizes the grants, exchanges and forfeitures of restricted common stock and RSUs during 2016, 2015 and 2014:
| Type | Date |  | Restricted Stock |  | RSUs |  | Estimate Fair Value on Grant Date ($) |  | Initial Vesting |  | Final Vesting
Outstanding at January 1, 2014 |  | 208,416 |  |  | 503,750 |  |  |  |  |  |  |
| Canceled upon delivery | January 2014 |  | — |  |  | (288,750 | ) |  | n/a |  |  | n/a |  | n/a
| Grant | April 2014 |  | 8,931 |  |  | — |  |  | 150 |  |  | July 2014 |  | April 2017
| Grant | April 2014 |  | 5,000 |  |  | — |  |  | 85 |  |  | July 2014 |  | April 2017
| Canceled upon delivery | April 2014 |  | — |  |  | (5,000 | ) |  | n/a |  |  | n/a |  | n/a
| Grant | June 2014 |  | — |  |  | 10,254 |  |  | 169 |  |  | December 2014 |  | December 2016
| Grant | December 2014 |  | 51,767 |  |  | — |  |  | 855 |  |  | December 2015 |  | December 2017
| Grant | December 2014 |  | — |  |  | 390,000 |  |  | 6,474 |  |  | December 2015 |  | December 2017
| Grant | January 2015 |  | — |  |  | 8,000 |  |  | 132 |  |  | December 2015 |  | December 2017
| Forfeiture | January 2015 |  | — |  |  | (5,000 | ) |  | n/a |  |  | n/a |  | n/a
| Canceled upon delivery | March 2015 |  | — |  |  | (20,000 | ) |  | n/a |  |  | n/a |  | n/a
| Grant | April 2015 |  | 15,950 |  |  | — |  |  | 275 |  |  | July 2015 |  | April 2018
| Forfeiture | June 2015 |  | — |  |  | (3,500 | ) |  | n/a |  |  | n/a |  | n/a
| Grant | July 2015 |  | — |  |  | 1,631 |  |  | 27 |  |  | June 2016 |  | June 2018
| Forfeiture | August 2015 |  | — |  |  | (5,000 | ) |  | n/a |  |  | n/a |  | n/a
| Grant | December 2015 |  | 50,000 |  |  | — |  |  | 874 |  |  | December 2016 |  | December 2018
| Grant | December 2015 |  | — |  |  | 656,425 |  |  | 11,461 |  |  | December 2016 |  | December 2018
| Canceled upon delivery | January 2016 |  | — |  |  | (318,160 | ) |  | n/a |  |  | n/a |  | n/a
| Forfeiture | January 2016 |  | — |  |  | (1,667 | ) |  | n/a |  |  | n/a |  | n/a
| Grant | February 2016 |  | — |  |  | 47,028 |  |  | 729 |  |  | (1) |  | (1)
| Grant | March 2016 |  | — |  |  | 5,095 |  |  | 81 |  |  | December 2016 |  | December 2017
| Grant | April 2016 |  | 17,056 |  |  | — |  |  | 275 |  |  | July 2016 |  | April 2019
| Forfeiture | June 2016 |  | — |  |  | (14,972 | ) |  | n/a |  |  | n/a |  | n/a
| Canceled upon delivery | July 2016 |  | — |  |  | (543 | ) |  | n/a |  |  | n/a |  | n/a
| Forfeiture | July 2016 |  | — |  |  | (12,792 | ) |  | n/a |  |  | n/a |  | n/a
| Grant | July 2016 |  | — |  |  | 1,528 |  |  | 25 |  |  | September 2016 |  | September 2016
| Forfeiture | August 2016 |  | — |  |  | (15,642 | ) |  | n/a |  |  | n/a |  | n/a
| Grant | September 2016 |  | — |  |  | 6,146 |  |  | 101 |  |  | October 2016 |  | October 2016
| Canceled upon delivery | September 2016 |  | — |  |  | (41,281 | ) |  | n/a |  |  | n/a |  | n/a
| Canceled upon delivery | October 2016 |  | — |  |  | (30,900 | ) |  | n/a |  |  | n/a |  | n/a
| Canceled upon delivery | November 2016 |  | — |  |  | (6,146 | ) |  | n/a |  |  | n/a |  | n/a
| Grant | December 2016 |  | 75,000 |  |  | — |  |  | 1,251 |  |  | December 2017 |  | December 2019
| Grant | December 2016 |  | — |  |  | 843,271 |  |  | 14,015 |  |  | December 2017 |  | December 2019
Outstanding at December 31, 2016 |  | 432,120 |  |  | 1,703,775 |  |  |  |  |  |  |
(1) These awards vest based upon the achievement of certain conditions. Below is a summary of restricted stock and RSU vesting dates as of December 31, 2016.
Vesting Date | Shares Vesting |  | RSU Vesting |  | Total Awards
January 2017 | 5,161 |  |  | — |  |  | 5,161 |
April 2017 | 5,164 |  |  | — |  |  | 5,164 |
June 2017 | — |  |  | 544 |  |  | 544 |
July 2017 | 4,004 |  |  | — |  |  | 4,004 |
October 2017 | 3,997 |  |  | — |  |  | 3,997 |
December 2017 | 53,923 |  |  | 603,189 |  |  | 657,112 |
January 2018 | 2,749 |  |  | — |  |  | 2,749 |
April 2018 | 2,755 |  |  | — |  |  | 2,755 |
June 2018 | — |  |  | 544 |  |  | 544 |
July 2018 | 1,420 |  |  | — |  |  | 1,420 |
October 2018 | 1,424 |  |  | — |  |  | 1,424 |
December 2018 | 41,670 |  |  | 486,037 |  |  | 527,707 |
January 2019 | 1,419 |  |  | — |  |  | 1,419 |
April 2019 | 1,424 |  |  | — |  |  | 1,424 |
December 2019 | 25,000 |  |  | 281,112 |  |  | 306,112 |
| 150,110 |  |  | 1,371,426 |  |  | 1,521,536 |

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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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