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Stock Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Award Activity under Plans | The following is the activity under the Plans during the three month period ended March 31, 2019.
| Three Months Ended March 31, 2019 |
| Maximum Awarded Service Units |  |  | Weighted Average Grant Date Fair Value |  |  | Maximum Awarded Performance Units |  |  | Weighted Average Grant Date Fair Value |
Beginning balance - nonvested shares |  | 87,955 |  |  | $ | 13.04 |  |  |  | 203,828 |  |  | $ | 11.96 |
Granted |  | 18,913 |  |  |  | 13.61 |  |  |  | 67,651 |  |  |  | 13.50 |
Vested |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0.00 |
Forfeited |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0.00 |
Ending balance - nonvested shares |  | 106,868 |  |  |  | 13.14 |  |  |  | 271,479 |  |  |  | 12.35 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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