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Share Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] | A summary of changes in the common shares subject to nonvested PBRSUs for the three months ended March 31, 2017 follows:
| Common shares subject to PBRSUs
Nonvested at January 1, 2017 | 85,425 |
Granted | 45,788 |
Vested | 9,674 |
Forfeited | 150 |
Adjustment for performance conditions of PBRSUs (1) | (1,802 | )
Nonvested at March 31, 2017 | 119,587 |
Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block] | The following table details expected additional share-based compensation expense related to PBRSUs currently outstanding:
(In thousands) |  |
Nine months ending December 31, 2017 |  | $ | 2,247 |
2018 |  | 2,641 |
2019 |  | 1,964 |
2020 |  | 890 |
2021 |  | 149 |
Total |  | $ | 7,891 |

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the total compensation cost related to nonvested awards not yet recognized and the weighted-average period over which it is expected to be recognized. + 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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