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Share-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2017
Share-based Compensation, Allocation and Classification in Financial Statements [Abstract] |
Schedule Of Performance Vesting Restricted Stock Units Granted | The Compensation Committee of the Company’s Board of Directors granted RSU awards to the Company’s senior management and key employees which will vest based upon the Company's performance during three-year performance periods ending on December 31, 2017 and 2018:
| Grant Year
| 2016 |  | 2015
Three-year performance period ending December 31, | 2018 |  |  | 2017 |
Vesting shares, target (net of forfeited) | 84,750 |  |  | 87,250 |
Vesting shares, maximum (net of forfeited) | 158,906 |  |  | 163,594 |

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- Definition Tabular disclosure of the number, aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both restricted stock units outstanding and restricted stock units fully vested and expected to vest at the date of the latest statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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