Stock-Based Compensation (Tables)
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12 Months Ended |
Dec. 31, 2020 |
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| Share-based Payment Arrangement [Abstract] |
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| Schedule of stock-based compensation expense |
Stock-based compensation expense under the Company's plans was as follows:
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Year Ended December 31, |
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2020 |
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2019 |
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2018 |
| Stock-based compensation expense |
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$ |
56,292 |
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$ |
54,436 |
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$ |
40,245 |
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| Tax effect on stock-based compensation expense |
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(14,354) |
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(13,734) |
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(10,093) |
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| Net effect on income |
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$ |
41,938 |
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$ |
40,702 |
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$ |
30,152 |
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| Schedule of weighted average assumptions used to value options granted |
The following weighted average assumptions were used to value options granted during the periods indicated:
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December 31, |
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2020 |
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2019 |
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2018 |
| Grant date fair value of options |
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$ |
— |
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$ |
21.55 |
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$ |
— |
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| Volatility |
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— |
% |
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40.0 |
% |
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— |
% |
| Risk-free interest rate |
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— |
% |
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2.5 |
% |
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— |
% |
| Dividend yield |
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— |
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— |
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— |
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| Expected term (in years) |
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0.0 |
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6.5 |
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0.0 |
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| Summary of option activity under the Company's plans |
The following table summarizes option activity under the Company’s plans:
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Weighted-Average |
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Weighted- |
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Remaining |
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Average |
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Contractual Life |
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Aggregate |
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Options |
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Exercise Price |
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(Years) |
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Intrinsic Value |
| Outstanding as of December 31, 2017 |
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2,254,565 |
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$ |
19.23 |
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4.3 |
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$ |
69,939 |
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| Granted |
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— |
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— |
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| Exercised |
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(359,345) |
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14.76 |
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| Forfeited |
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(7,251) |
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27.51 |
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| Outstanding as of December 31, 2018 |
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1,887,969 |
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20.05 |
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3.4 |
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56,046 |
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| Granted |
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81,807 |
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49.02 |
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| Exercised |
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(783,216) |
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13.52 |
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| Forfeited |
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(35,974) |
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48.33 |
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| Outstanding as of December 31, 2019 |
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1,150,586 |
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25.66 |
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3.4 |
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50,590 |
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| Granted |
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— |
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— |
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| Exercised |
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(705,333) |
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18.83 |
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| Forfeited |
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(7,213) |
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48.70 |
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| Outstanding as of December 31, 2020 |
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438,040 |
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36.28 |
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4.1 |
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20,156 |
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| Options exercisable |
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397,861 |
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34.99 |
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3.7 |
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18,817 |
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| Schedule of other information |
Other information is as follows:
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Year Ended December 31, |
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2020 |
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2019 |
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2018 |
| Total intrinsic value of options exercised |
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$ |
35,687 |
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$ |
40,893 |
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$ |
15,667 |
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| Cash received from exercises of stock options |
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10,760 |
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10,592 |
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5,305 |
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| Summary of the activity for unvested restricted stock units and awards granted under the Company's plans |
The following is a summary of the activity for unvested restricted stock units and awards granted under the Company’s plans:
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RSUs |
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PSUs |
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Weighted- |
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Weighted- |
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Average Grant |
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Average Grant |
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Number of |
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Date Fair Value |
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Number of |
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Date Fair Value |
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Shares |
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per Share |
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Shares |
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per Share |
| Outstanding as of December 31, 2017 |
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1,629,971 |
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$ |
32.60 |
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136,668 |
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$ |
31.03 |
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| Granted |
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940,113 |
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55.24 |
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55,986 |
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61.25 |
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| Vested |
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(1,005,347) |
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32.73 |
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(68,334) |
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31.03 |
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| Forfeited |
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(103,269) |
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40.37 |
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— |
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— |
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| Outstanding as of December 31, 2018 |
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1,461,468 |
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46.59 |
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124,320 |
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44.64 |
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| Granted |
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997,971 |
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61.91 |
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202,168 |
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69.68 |
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| Vested |
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(1,029,790) |
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45.11 |
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(68,334) |
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31.03 |
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| Forfeited |
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(110,779) |
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53.16 |
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(4,036) |
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61.27 |
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| Outstanding as of December 31, 2019 |
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1,318,870 |
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58.88 |
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254,118 |
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67.96 |
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| Granted |
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970,390 |
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74.61 |
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81,689 |
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83.47 |
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| Vested |
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(804,982) |
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57.77 |
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— |
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— |
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| Forfeited |
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(138,931) |
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62.14 |
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(33,010) |
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64.70 |
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| Outstanding as of December 31, 2020 |
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1,345,347 |
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70.56 |
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302,797 |
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72.50 |
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