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Share-based Compensation - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	May 23, 2023	Dec. 31, 2020
Stock Option Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%	0.00%	0.00%
Options outstanding, shares	1,294,000	1,577,000	1,167,000		1,157,000
Stock options vested	260,625	245,500	200,625
Aggregate fair value of stock option vested	$ 51,600,000	$ 35,800,000	$ 11,000,000
Weighted average grant date fair value of stock option awards	$ 194.94	$ 201.64	$ 372.05
Share-based compensation expense recognized	$ 44,800,000	$ 48,300,000	$ 32,000,000
Unrecognized share-based compensation expense	$ 70,800,000
Unrecognized compensation expense expected to be recognized	2 years
Share-settled Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate fair value of stock option vested	$ 13,500,000	12,300,000	3,300,000
Share-based compensation expense recognized	$ 17,400,000	$ 13,400,000	$ 8,000,000
Unrecognized compensation expense expected to be recognized	2 years 9 months 18 days
Restricted stock units outstanding	185,153	120,000	105,000		74,000
Share-settled restricted stock units vested	36,502	28,180	17,004
Number of shares withheld to satisfy tax obligations	10,440	9,467	5,857
Shares issued	26,062	18,713	11,147
Granted, weighted average grant date fair value (in dollars per share)	$ 292.83	$ 246.17	$ 736.46
Unrecognized share-based compensation expense	$ 49,400,000
Granted	123,000	60,000	58,000
Share-settled Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%
Aggregate fair value of stock option vested	$ 0
Unrecognized compensation expense expected to be recognized	2 years 6 months
Restricted stock units outstanding	25,000	0
Unrecognized share-based compensation expense	$ 10,000,000
Granted	27,000
Class A \| Stock Option Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation award expiration period	10 years
Vesting period	4 years
Options outstanding, shares	1,293,627
2013 Equity Plan \| Other Stock-based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	0	0	9,000
Outstanding	10,250
2013 Equity Plan \| Other Stock Based Awards and Cash Settled RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense recognized	$ 3,200,000	$ (500,000)	$ 1,400,000
Unrecognized compensation expense expected to be recognized	1 year 1 month 6 days
Unrecognized share-based compensation expense	$ 1,200,000
2013 Equity Plan \| Cash Settled RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	0	0	900
Outstanding	250
2023 Equity Plan \| Share-settled Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
2023 Equity Plan \| Share-settled Restricted Stock Units \| Board of Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
2023 Equity Plan \| Share-settled Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value of stock option awards	$ 486.18
Share-based compensation expense recognized	$ 2,300,000
Restricted stock units outstanding	25,375
2023 Equity Plan \| Minimum \| Share-settled Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target performance stock unit awards granted	0.00%
2023 Equity Plan \| Maximum \| Share-settled Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target performance stock unit awards granted	200.00%
2023 Equity Plan \| Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, stock authorized				1,932,703
Shares of class A common stock reserved and available for future issuance	238,593
2023 Equity Plan \| Class A \| Stock Option Awards \| Board of Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
2023 Equity Plan \| Class A \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, stock authorized				1,732,703
2023 Equity Plan \| New Shares of Class A Authorized for Issuance
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, stock authorized				200,000
2021 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense recognized	$ 1,900,000	$ 2,400,000	$ 2,600,000
Unrecognized compensation expense expected to be recognized	2 months 12 days
Unrecognized share-based compensation expense	$ 300,000
Percentage of discounted share purchase right	15.00%
2021 Employee Stock Purchase Plan \| Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, stock authorized	100,000
Shares of class A common stock reserved and available for future issuance	59,607
Common stock, shares issued	19,856	15,925	4,612
Share Purchase Price Description	shares are purchased at a price equal to 85% of the lesser of the closing price of the Company’s class A common stock on the first or last business day of the offering period, respectively
Purchase price of common stock, percentage of fair market value	85.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used	the intrinsic value of the 15% discounted share purchase rights and the fair value of the look-back provision using the Black-Scholes valuation model, recognized on a straight-line basis over the offering period. The grant date is the offering period commencement date.