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Restricted Stock Units, Percentage Granted as Long Term Incentive Compensation

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Restricted Stock Units, Percentage Vesting Upon Meeting Certain Thresholds

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Share based compensation arrangement by share based payment award number of underlying shares available.

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Share based compensation arrangement by share based payment award percentage by which tangible book value must increase.

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

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Discount rate from fair value on purchase date that participants pay for shares.

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The number of grants made 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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Net number of non-option equity instruments granted to participants.

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Number of additional shares authorized for issuance under share-based payment arrangement.

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No definition available.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Gross number of share options (or share units) granted during the period.

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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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Purchase price of common stock expressed as a percentage of its fair value.

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Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

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Value of stock issued in lieu of cash for services contributed to the entity. Value of the stock issued includes, but is not limited to, services contributed by vendors and founders.

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Share-Based Compensation Plans - Narrative (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum exercisable period for stock options (years)	10 years
Maximum number of shares that may be issued under 2010 plan (shares)	750,000
Aggregate number of shares of common stock available for grant (shares)	841,513
Employee stock purchase plan expense	$ 13,200	$ 11,200	$ 11,000
Nonvested awards, compensation cost not yet recognized	$ 22,500
Number of shares granted (shares)	19,164
Cash received from exercise of options	$ 800
Tax benefit from exercise of options	$ 100
Restricted stock units, granted as long term incentive compensation (percent)	40.00%
Restricted stock units, vesting upon meeting certain thresholds (percent)	60.00%
Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued for services (shares)	26,791
Stock issued for services, value	$ 1,300
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (shares)	22,300			300,000
Award vesting period (years)	3 years
Number of restricted stock units granted (shares)	364,899
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options expiration date (years)	10 years
Number of shares granted (shares)	19,164	0	0
Stock Options \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	3 years
Stock Options \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	5 years
2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fully diluted tangible book value	50.00%
Maximum number of shares that may be issued under 2010 plan (shares)	3,666,667
2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares that may be issued under 2010 plan (shares)		740,325	330,000
Maximum number of shares that may be issued under plan (shares)	3,320,325
2004 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares that may be issued under plan (shares)	2,750,000
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase plan expense	$ 170	$ 172	$ 192
Purchase price under employee stock purchase plan (percent)	85.00%
Purchase price under employee stock purchase plan, discount (percent)	15.00%
2004 and 2019 Plan \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (shares)	364,899
2004 and 2019 Plan \| Restricted Stock Units \| Waterfall
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	3 years
2004 and 2019 Plan \| Restricted Stock Units \| Cliff
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	3 years
Number of restricted stock units granted (shares)	39,555