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Share-Based Transactions (Tables) | 6 Months Ended
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Jun. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Impacts of Equity Awards Granted | The impacts of equity awards granted are as follows:
|  | Three months ended June 30, | Six months ended June 30, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
|  | (In thousands) |
Total equity awards expense recognized |  | $ | 1,891 |  |  | $ | 1,923 |  |  | $ | 13,392 |  |  | $ | 11,667 |
Quarterly incentive awards expense deferred |  |  | 2,485 |  |  |  | 2,668 |  |  |  | 4,979 |  |  |  | 5,418 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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