Stock-Based Compensation - Additional Information (Detail) $ / shares in Units, $ in Thousands		1 Months Ended		3 Months Ended		9 Months Ended
	Apr. 14, 2022 shares	May 31, 2022 shares	Feb. 28, 2022 Company TradingDay shares	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Capitalized compensation cost | $						$ 6,545	$ 5,108
Software and Capitalized Software Costs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Capitalized compensation cost | $				$ 2,300	$ 1,700	$ 6,500	5,100
Time-Based Shares [Member] | Chief Operating Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Number of shares vested in period	5,663
LTIP [Member] | Time-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Restricted shares of common stock issued						500,000
Restricted Stock [Member] | Time-Based Shares [Member] | Non Executive Employees [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period						3 years
Restricted Stock [Member] | Time-Based Shares [Member] | Non Executive Employees [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period						4 years
Restricted Stock [Member] | LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Restricted shares of common stock issued						421,739
Restricted Stock [Member] | LTIP [Member] | Market-Based Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Restricted shares of common stock issued						59,503
Restricted Stock [Member] | LTIP [Member] | VWAP Value Equals or Exceeds $484 Per Share [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Vesting percentage, restricted shares						50.00%
VWAP Share Price | $ / shares						$ 484
Restricted Stock [Member] | LTIP [Member] | Time-Based Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Restricted shares of common stock issued						362,236
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period						4 years
Restricted Stock [Member] | LTIP [Member] | Time-Based Shares [Member] | Non Employee Members[Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Restricted shares of common stock issued		5,210
Share-based compensation arrangement by share-based payment award, award vesting rights						will cliff-vest on May 9, 2023, provided that such director is providing services to the Company through the applicable vesting date, and subject to the terms and conditions of the LTIP and the applicable restricted stock award agreement.
Restricted Stock [Member] | LTIP [Member] | VWAP Value Equals or Exceeds $559 Per Share [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Vesting percentage, restricted shares						50.00%
VWAP Share Price | $ / shares						$ 559
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Restricted shares of common stock issued						51,500
Performance Shares | LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Number of publicly traded companies | Company			35
Number of trading day | TradingDay			60
Performance Shares | LTIP [Member] | Executive Officers
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Performance share units			51,494
Performance Shares | LTIP [Member] | Executive Officers | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Performance share units			128,735
Performance Shares | LTIP [Member] | Two Year Performance Period
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Performance period commencement date			Jan. 01, 2022
Performance period maturity date			Dec. 31, 2023
Percentage of PSUs eligible to vest			25.00%
Deadline for vesting of shares			Feb. 29, 2024
Performance Shares | LTIP [Member] | Three Year Performance Period
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Performance period commencement date			Jan. 01, 2022
Performance period maturity date			Dec. 31, 2024
Percentage of PSUs eligible to vest			75.00%
Deadline for vesting of shares			Mar. 01, 2025
Restricted Stock Awards and PSU Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated Share Based Compensation Expense | $				$ 24,500	$ 29,000	$ 70,800	$ 76,400