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Shareholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2018
Equity [Abstract] |
Schedule of Share-based compensation expense and related tax benefits | Share-based compensation expense and related tax benefits were as follows:
| Three Months Ended June 30 |  | Six Months Ended June 30
(In thousands) | 2018 |  | 2017 |  | 2018 |  | 2017
Share-based compensation expense | $ | 1,615 |  |  | $ | 2,746 |  |  | $ | 2,517 |  |  | $ | 6,092 |
Related tax benefits | $ | 339 |  |  | $ | 961 |  |  | $ | 529 |  |  | $ | 2,132 |
Reclassification adjustments related to available-for-sale securities | Amounts reclassified from AOCI to net income and the amounts of deferred tax expense (benefit) included in OCI were as follows:
| Three Months Ended June 30 |  | Six Months Ended June 30
(In thousands) | 2018 |  | 2017 |  | 2018 |  | 2017
Reclassifications from AOCI to net income: |  |  |  |  |  |  |
Realized investment gains (losses) | $ | (1,691 | ) |  | $ | (653 | ) |  | $ | 726 |  |  | $ | 963 |
Non-credit impairment losses reclassified to earnings, due to sale of securities or reclassification as a credit loss | — |  |  | (3 | ) |  | — |  |  | (3 | )
Total gains (losses) reclassified, before tax effect | (1,691 | ) |  | (656 | ) |  | 726 |  |  | 960 |
Tax effect* | 355 |  |  | 230 |  |  | (153 | ) |  | (336 | )
Net reclassification adjustments | $ | (1,336 | ) |  | $ | (426 | ) |  | $ | 573 |  |  | $ | 624 |
Deferred tax expense (benefit) included in OCI | $ | (2,185 | ) |  | $ | 2,983 |  |  | $ | (9,245 | ) |  | $ | 4,464 |
* Tax effects were computed using a 21% and 35% rate for the three and six months ended June 30, 2018 and 2017, respectively.

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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