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Employee Benefit Plans (Tables) | 3 Months Ended
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Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Share-Based Awards Granted | During the three-month period ended March 31, 2015, the following grants of share-based awards were made under the 2005 Incentive Plan:
Date of Grant |  |  | Shares |  |  |  | Grant Date Fair Value Per Share |  |  | Vesting Period
January 2, 2015 (1) |  |  | 289,163 |  |  |  |  | $ | 21.70 |  |  |  | 33% per year over three years
January 2, 2015 (2) |  |  | 289,163 |  |  |  |  | $ | 25.06 |  |  |  | 100% on January 1, 2018
January 5, 2015 (3) |  |  | 3,946 |  |  |  |  | $ | 21.66 |  |  |  | 100% on January 1, 2017
January 12, 2015 (1) |  |  | 3,866 |  |  |  |  | $ | 19.40 |  |  |  | 33% per year over three years
January 12, 2015 (2) |  |  | 3,866 |  |  |  |  | $ | 25.06 |  |  |  | 100% on January 11, 2018
February 1, 2015 (1) |  |  | 2,664 |  |  |  |  | $ | 18.77 |  |  |  | 33% per year over three years
February 1, 2015 (2) |  |  | 2,664 |  |  |  |  | $ | 25.06 |  |  |  | 100% on January 31, 2018
(1) | Reflects the grant of restricted stock to our executive officers and selected management employees.
(2) | Reflects the grant of performance share units (“PSUs”) to our executive officers and selected management employees. The PSUs provide for an award based on the performance of our common stock over a three-year period with the maximum amount of the award being 200% of the original awarded PSUs and the minimum amount being zero. The vested PSUs may be settled in either cash or shares of our common stock at the discretion of the Compensation Committee of our Board of Directors.
(3) | Reflects the grant of restricted stock to certain members of our Board of Directors who have made an election to take their quarterly fees in stock in lieu of cash.

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