Stock-Based Incentive Plans - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) plan shares	Dec. 31, 2022 shares	Dec. 31, 2021 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of current benefit plans | plan	2
Number of benefit plans | plan	9
Number of expired benefit plans | plan	7
Restricted Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares, vesting period (in years)	3 years
Number of shares of restricted class A common stock outstanding (in shares)	2,180,181	1,883,784	1,706,121
Unrecognized compensation cost relating to nonvested share-based compensation | $	$ 51.2
Unrecognized compensation cost expected to be recognized over weighted average period (in years)	1 year 2 months 12 days
Expired Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available under plan (in shares)	0
Vest in 2024 | Restricted Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of restricted class A common stock outstanding (in shares)	1,148,236
Vest in 2025 | Restricted Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of restricted class A common stock outstanding (in shares)	727,820
Vest in 2026 | Restricted Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of restricted class A common stock outstanding (in shares)	304,125
Class A Common Stock | Stock Incentive Current Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares available under plan (in shares)	10,400,000
Number of shares available under plan (in shares)	7,754,648