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Share-Based Compensation and Benefit Plans - Additional Information (Detail) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) Age $ / shares shares | Dec. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options of common stock outstanding | shares | 602,488 | 585,116 |
Income tax expense | $ 128,797 | $ 76,623 | $ 67,077
Shares withheld as payment for tax withholdings related to share based compensation, market value | 1,092 | 2,299 | 1,528
Common stock contribution to 401(k) plan | $ 5,154 | $ 4,543 | $ 4,274
Employee Stock Purchase Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Aggregate shares of common stock that may be granted | shares | 1,500,000 |  |
Shares reserved for future grant | shares | 450,945 |  |
Number of days of service required for an employee to purchase shares | 90 days |  |
Discount to employees to purchase shares | 5.00% |  |
Shares purchased under ESPP | shares | 3,501 | 5,121 | 5,676
Average price of the shares purchased by employees | $ / shares | $ 239.11 | $ 171.89 | $ 145.09
Additional shares issued resulting from cash dividends reinvested in common stock | shares | 2,962 | 3,964 | 5,087
Net proceeds from shares purchased under ESPP | $ 1,676 | $ 1,649 | $ 1,638
2014 Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options of common stock outstanding | shares | 498,138 |  |
2014 Plan | Minimum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Years in which options plan vest | 2 years |  |
2014 Plan | Maximum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Years in which options plan vest | 4 years |  |
401(k) Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Common stock contribution to 401(k) Plan, shares | shares | 22,752 | 25,216 | 30,715
Common stock contribution to 401(k) plan | $ 5,154 | $ 4,543 | $ 4,274
2021 Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percent of market price that share-based compensation awards are granted at | 100.00% |  |
Aggregate shares of common stock that may be granted | shares | 2,500,000 |  |
Shares reserved for future grant | shares | 2,381,332 |  |
Contractual term of stock option awards | 5 years |  |
2021 Plan | Minimum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Years in which options plan vest | 2 years |  |
2021 Plan | Maximum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Years in which options plan vest | 4 years |  |
2021 Plan | Common and Class B Common Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares awarded under plan | shares | 125,995 |  |
Non-Vested Restricted Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted-average grant date fair value of non-vested (restricted) stock | $ / shares | $ 254.73 | $ 193.89 | $ 151.58
Fair value of non-vested stock that vested | $ 3,646 | $ 7,354 | $ 4,931
Unrecognized share-based compensation expense | $ 180,661 |  |
Vesting period related to unrecognized share-based compensation expense | 11 years 9 months 18 days |  |
Non-Vested Restricted Stock | Chief Executive Officer |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized share-based compensation expense | $ 55,000 |  |
Vesting period related to unrecognized share-based compensation expense | 7 years |  |
Vesting period related to shares obligated to issue in connection with incentive compensation agreement | shares | 32,592 |  |
Non-Vested Restricted Stock | Chief Executive Officer | Share-based Compensation Award, Tranche One |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized share-based compensation expense | $ 1,000 |  |
Vesting period related to unrecognized share-based compensation expense | 1 year |  |
Age of Chief Executive Officer when non-vested (restricted) stock vests | Age | 82 |  |
Non-Vested Restricted Stock | Chief Executive Officer | Share-based Compensation Award, Tranche Two |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized share-based compensation expense | $ 26,000 |  |
Vesting period related to unrecognized share-based compensation expense | 5 years |  |
Age of Chief Executive Officer when non-vested (restricted) stock vests | Age | 86 |  |
Non-Vested Restricted Stock | Chief Executive Officer | Share-based Compensation Award, Tranche Three |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized share-based compensation expense | $ 27,000 |  |
Vesting period related to unrecognized share-based compensation expense | 7 years |  |
Age of Chief Executive Officer when non-vested (restricted) stock vests | Age | 88 |  |
Non-Vested Restricted Stock | Chief Executive Officer | Share Based Compensation Award Tranche Four Member [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized share-based compensation expense | $ 1,000 |  |
Vesting period related to unrecognized share-based compensation expense | 8 years |  |
Age of Chief Executive Officer when non-vested (restricted) stock vests | Age | 89 |  |
Non-Vested Restricted Stock | President |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized share-based compensation expense | $ 31,000 |  |
Vesting period related to unrecognized share-based compensation expense | 22 years |  |
Vesting period related to shares obligated to issue in connection with incentive compensation agreement | shares | 31,668 |  |
Non-Vested Restricted Stock | President | Share-based Compensation Award, Tranche One |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized share-based compensation expense | $ 30,000 |  |
Vesting period related to unrecognized share-based compensation expense | 22 years |  |
Age of president when non vested restricted shares vests | Age | 62 |  |
Non-Vested Restricted Stock | President | Share-based Compensation Award, Tranche Two |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unrecognized share-based compensation expense | $ 1,000 |  |
Vesting period related to unrecognized share-based compensation expense | 24 years |  |
Age of president when non vested restricted shares vests | Age | 64 |  |
Non-Vested Restricted Stock | Employee |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Age of employee when non-vested (restricted) stock vests | Age | 62 |  |
Non-Vested Restricted Stock | Various Key Leaders |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period related to shares obligated to issue in connection with incentive compensation agreement | shares | 18,540 |  |
Non-Vested Restricted Stock | Various Key Leaders | Minimum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period related to unrecognized share-based compensation expense | 5 years |  |
Non-Vested Restricted Stock | Various Key Leaders | Maximum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period related to unrecognized share-based compensation expense | 14 years |  |
Non-Vested Restricted Stock | Common and Class B Common Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares withheld as payment for tax withholdings related to share based compensation, shares | shares |  | 11,693 | 9,824
Shares withheld as payment for tax withholdings related to share based compensation, market value |  | $ 2,299 | $ 1,518
Non-Vested Restricted Stock | Class B Common Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares withheld as payment for tax withholdings related to share based compensation, shares | shares | 3,858 |  |
Shares withheld as payment for tax withholdings related to share based compensation, market value | $ 1,078 |  |
Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Income tax expense | 3,595 | 1,586 | 626
Total intrinsic value of stock options exercised | 16,903 | 8,753 | 4,153
Cash received from Common stock issued | 19,338 | 17,608 | 11,703
Unrecognized share-based compensation expense | $ 5,770 |  |
Vesting period related to unrecognized share-based compensation expense | 1 year 10 months 24 days |  |
Fair value of stock options vested | $ 2,621 | $ 2,177 | $ 2,055
Stock Options | Common Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares withheld as payment for tax withholdings related to share based compensation, shares | shares | 4,040 | 11,455 | 799
Shares withheld as payment for tax withholdings related to share based compensation, market value | $ 1,179 | $ 2,343 | $ 134

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- Definition Vesting age of chief executive officer. + References No definition available. + Details
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- Definition Vesting age of employee. + References No definition available. + Details
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- Definition Vesting age of president + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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