Stock-based Compensation - Additional Information (Detail) - USD ($)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock authorized for share based payment awards under 2011 Plan	2,600,000
Shares available for grant under the 2011 plan	528,479
Compensation expenses	$ 11,716,000	$ 10,080,000	$ 8,872,000
Income tax benefit recognized in the income statement for share-based compensation arrangements	2,867,000	2,390,000	1,501,000
Proceeds from stock option exercises	$ 1,369,000	$ 2,926,000	$ 3,037,000
Stock Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Period of expiration	10 years
Weighted-average grant-date fair values of options awarded	$ 36.49	$ 25.90	$ 26.49
Intrinsic values of options exercised	$ 1,287,000	$ 2,534,000	$ 2,518,000
Unrecognized compensation cost	$ 2,229,000
Weighted average period for amortization of unrecognized compensation cost	1 year 8 months 12 days
Actual tax benefit recognized for the tax deductions from stock based compensation	$ 172,000	$ 339,000	$ 348,000
Stock Option Granted Prior to 2017 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	2 years
Stock Options Granted in 2017 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years
Percentage of awards vesting in each year	33.33%
Performance Stock Award [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance stock awards vested	0
Stock Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost	$ 4,971,000
Weighted average period for amortization of unrecognized compensation cost	1 year 7 months 6 days
Performance stock awards vested	48,613
Weighted-average grant-date fair values of awards granted	$ 119.76	$ 98.46	$ 89.12
SARs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Period of expiration	10 years
Unrecognized compensation cost	$ 4,828,000
Weighted average period for amortization of unrecognized compensation cost	1 year 8 months 12 days
Weighted-average grant-date fair values of awards granted	$ 36.49	$ 25.88	$ 26.43
SARs liability cash-settled	$ 1,502,000	$ 2,368,000
SARs Granted Prior to 2017 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	2 years
SARs Granted in 2017 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years
Percentage of awards vesting in each year	33.33%

Stock appreciation rights liabilities noncurrent.

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Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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