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Earnings Per Share Data ("EPS") and Stock Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Anti-dilutive weighted average stock options excluded from computation of earnings per share | 4,100,000 | 7,100,000 | 4,300,000 | 6,700,000
Unrecognized compensation cost related to unvested options and restricted stock | $ 144,600 |  | $ 144,600 |
Stock options granted during period |  |  | 2,396,402 |
Market price premium percentage |  |  | 10.00% |
Weighted-average grant date fair value, per option |  |  | $ 39.66 |
Compensation cost recognized |  |  | $ 55,548 | $ 49,928
Stock Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Compensation cost recognized, pre-tax charge | 14,600 | $ 13,000 | 44,800 | 41,600
Restricted Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Compensation cost recognized, pre-tax charge | $ 3,500 | $ 2,500 | $ 9,600 | $ 7,300
Unrecognized compensation cost vesting period |  |  | 2 years 9 months 18 days |
Restricted shares and restricted units granted during period |  |  | 150,860 |
Weighted-average grant date fair value, per share |  |  | $ 138.80 |
Unvested Stock option |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unrecognized compensation cost vesting period |  |  | 2 years 9 months 18 days |
Market Price Premium |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock options granted during period |  |  | 406,952 |

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