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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2018
Share-based Compensation [Abstract] |
Summary of Restricted Stock Transactions | A summary of restricted stock transactions during the three months ended March 31, 2018 follows:
| Number of shares
Non-vested stock awards outstanding at January 1, 2018 | 1,053,842 |
Awarded: |
Time-vesting shares | 73,173 |
Performance-based shares | 142,154 |
Released: |
Time-vesting shares | (59,035 | )
Forfeitures: |
Time-vesting shares | (4,575 | )
Performance-based shares | (159,738 | )
Non-vested stock awards outstanding at March 31, 2018 | 1,045,821 |

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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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