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Stock Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Stock-Based Compensation Expense Included in Consolidated Statement of Income and Comprehensive Income | Total stock-based compensation expense included in the Consolidated Statement of Income and Comprehensive Income was as follows:
| December 31,
(DOLLARS IN THOUSANDS) | 2019 |  | 2018 |  | 2017
Equity-based awards | $ | 34,482 |  |  | $ | 29,401 |  |  | $ | 26,567 |
Liability-based awards | 4,128 |  |  | 2,517 |  |  | 6,014 |
Total stock-based compensation | 38,610 |  |  | 31,918 |  |  | 32,581 |
Less tax benefit | (7,305 | ) |  | (6,556 | ) |  | (5,659 | )
Total stock-based compensation, net of tax | $ | 31,305 |  |  | $ | 25,362 |  |  | $ | 26,922 |
SSAR's and Stock Option Activity | SSARs and options activity was as follows:
(SHARE AMOUNTS IN THOUSANDS) | Shares Subject to SSARs/Options |  | Weighted Average Exercise Price |  | SSARs/ Options Exercisable
December 31, 2018 | 12 |  |  | $ | 117.21 |  |  | 4 |
Granted | 6 |  |  | 137.82 |  |  |
Exercised | (3 | ) |  | 60.39 |  |  |
Canceled | — |  |  | — |  |  |
December 31, 2019 | 15 |  |  | $ | 138.73 |  |  | 1 |
SSAR's and Stock Option Outstanding | SSARs and options outstanding at December 31, 2019 was as follows:
Price Range | Number Outstanding (in thousands) |  | Weighted Average Remaining Contractual Life (in years) |  | Weighted Average Exercise Price |  | Aggregate Intrinsic Value (in thousands)
Over $115 | 15 |  |  | 5.68 |  | $ | 138.73 |  |  | $ | — |
SSAR's and Stock Option Exercisable | SSARs and options exercisable as of December 31, 2019 was as follows:
Price Range | Number Exercisable (in thousands) |  | Weighted Average Remaining Contractual Life (in years) |  | Weighted Average Exercise Price |  | Aggregate Intrinsic Value (in thousands)
Over $115 | 1 |  |  | 2.34 |  | $ | 118.10 |  |  | $ | 2 |
RSU's [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
RSU, PRS and Cash RSU Activity | RSU activity was as follows:
| Number of Shares (in thousands) |  | Weighted Average Grant Date Fair Value Per Share
December 31, 2018 | 448 |  |  | $ | 125.99 |
Granted | 230 |  |  | 128.98 |
Vested | (164 | ) |  | 116.80 |
Forfeited | (17 | ) |  | 130.85 |
December 31, 2019 | 497 |  |  | $ | 130.24 |
Restricted Stock [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
RSU, PRS and Cash RSU Activity | The following table summarizes the Company's PRSU activity for the years ended December 31, 2019, 2018 and 2017:
(DOLLARS IN MILLIONS) | Issued Shares |  | Aggregate Purchase Price |  | Covered Shares
2019 | 61,991 |  |  | $ | 8.5 |  |  | 30,996 |
2018 | 66,674 |  |  | 9.3 |  |  | 33,337 |
2017 | 41,801 |  |  | 5.8 |  |  | 20,901 |
PRSU activity was as follows:
(SHARE AMOUNTS IN THOUSANDS) | Number of Shares |  | Weighted Average Grant Date Fair Value Per Share
December 31, 2018 | 162 |  |  | $ | 132.96 |
Granted | 62 |  |  | 137.82 |
Vested | (54 | ) |  | 119.81 |
Forfeited | (2 | ) |  | 138.97 |
December 31, 2019 | 168 |  |  | $ | 138.96 |
Cash RSU's [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
RSU, PRS and Cash RSU Activity | Cash RSU activity was as follows:
(SHARE AMOUNTS IN THOUSANDS) | Cash RSUs |  | Weighted Average Fair Value Per Share
December 31, 2018 | 92 |  |  | $ | 132.23 |
Granted | 37 |  |  | 126.35 |
Vested | (32 | ) |  | 134.68 |
Forfeited | (2 | ) |  | 132.32 |
December 31, 2019 | 95 |  |  | $ | 126.35 |

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