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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2019
Equity [Abstract] |
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] | The following table summarizes the Company's restricted share activity for the year ended December 31, 2019:
| Number of Shares |  | Weighted Average Fair Value
Non-vested balance at December 31, 2018 | 905,495 |  |  | $ | 20.38 |
Shares granted | 295,447 |  |  | 32.40 |
Shares vested(1) | (637,128 | ) |  | 15.80 |
Shares forfeited | (2,602 | ) |  | 34.50 |
Non-vested balance at December 31, 2019 | 561,212 |  |  | $ | 31.84 |
(1) Plan participants tendered 174,896 common shares to satisfy income tax withholding obligations. These shares were subsequently retired by the Company

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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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