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Share-Based Payments (Tables) | 12 Months Ended
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Dec. 31, 2015
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 2015, 2014 and 2013:
| Type | Date |  | Restricted Stock |  | RSUs |  | Estimate Fair Value on Grant Date |  | Initial Vesting |  | Final Vesting
Outstanding at January 1, 2013 |  | 172,112 |  |  | 308,750 |  |  |  |  |  |  |
| Grant | February 2013 |  | 20,000 |  |  | — |  |  | 352 |  |  | December 2013 |  | December 2015
| Grant | February 2013 |  | — |  |  | 180,000 |  |  | 3,166 |  |  | December 2013 |  | December 2015
| Grant | April 2013 |  | 11,304 |  |  | — |  |  | 200 |  |  | July 2013 |  | April 2016
| Grant | May 2013 |  | — |  |  | 15,000 |  |  | 264 |  |  | December 2013 |  | December 2015
| Forfeiture | June 2013 |  | — |  |  | (5,000 | ) |  | n/a |  |  | n/a |  | n/a
| Canceled upon delivery | July 2013 |  | — |  |  | (5,000 | ) |  | n/a |  |  | n/a |  | n/a
| Grant | September 2013 |  | — |  |  | 10,000 |  |  | 154 |  |  | September 2013 |  | September 2013
| Grant | November 2013 |  | 5,000 |  |  | — |  |  | 81 |  |  | December 2013 |  | October 2016
| 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
Outstanding at December 31, 2015 |  | 340,064 |  |  | 1,242,810 |  |  |  |  |  |  |
Below is a summary of restricted stock and RSU vesting dates as of December 31, 2015.
Vesting Date | Shares Vesting |  | RSU Vesting |  | Total Awards
January 2016 | 4,629 |  |  | — |  |  | 4,629 |
April 2016 | 4,627 |  |  | — |  |  | 4,627 |
June 2016 | — |  |  | 543 |  |  | 543 |
July 2016 | 4,158 |  |  | — |  |  | 4,158 |
October 2016 | 4,158 |  |  | — |  |  | 4,158 |
December 2016 | 28,920 |  |  | 350,379 |  |  | 379,299 |
January 2017 | 3,737 |  |  | — |  |  | 3,737 |
April 2017 | 3,745 |  |  | — |  |  | 3,745 |
June 2017 | — |  |  | 544 |  |  | 544 |
July 2017 | 2,580 |  |  | — |  |  | 2,580 |
October 2017 | 2,577 |  |  | — |  |  | 2,577 |
December 2017 | 28,923 |  |  | 346,982 |  |  | 375,905 |
January 2018 | 1,330 |  |  | — |  |  | 1,330 |
April 2018 | 1,331 |  |  | — |  |  | 1,331 |
June 2018 | — |  |  | 544 |  |  | 544 |
December 2018 | 16,670 |  |  | 218,822 |  |  | 235,492 |
| 107,385 |  |  | 917,814 |  |  | 1,025,199 |

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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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