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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2019
Share-based Payment Arrangement, Noncash Expense [Abstract] |
Summary of Restricted Stock Transactions | A summary of restricted and deferred stock transactions during the six months ended June 30, 2019 is as follows:
| Number of shares
Non-vested stock awards outstanding at January 1, 2019 | 2,142,743 |
Awarded: |
Time-vesting shares | 260,725 |
Performance-based shares | 202,876 |
Released: |
Time-vesting shares | (129,174 | )
Forfeitures: |
Time-vesting shares | (56,900 | )
Performance-based shares | (129,207 | )
Non-vested stock awards outstanding at June 30, 2019 | 2,291,063 |

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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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