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Stock Compensation Plans (Tables) | 3 Months Ended
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Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock-Based Compensation Expense and Related Tax Benefits | Stock-based compensation expense and related tax benefits were as follows:
| Three Months Ended March 31,
(DOLLARS IN THOUSANDS) | 2019 |  | 2018
Equity-based awards | $ | 7,604 |  |  | $ | 7,620 |
Liability-based awards | 730 |  |  | 155 |
Total stock-based compensation expense | 8,334 |  |  | 7,775 |
Less: Tax benefit | (1,382 | ) |  | (1,563 | )
Total stock-based compensation expense, after tax | $ | 6,952 |  |  | $ | 6,212 |

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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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