Subsequent Events - Additional Information (Detail) - USD ($)		6 Months Ended
	Jul. 15, 2022	Jun. 30, 2022
Credit Facility [Member]
Subsequent Event [Line Items]
Credit facility, maximum	$ 650,000,000.0
Revolving credit facility, maturity date		Jul. 15, 2027
Additional senior notes indebtedness	250,000,000.0
Credit Facility [Member] | Treasury Sweep Note Due March 31, 2025 [Member]
Subsequent Event [Line Items]
Credit facility, indebtedness	12,000,000.0
Revolving credit facility, maturity date		Mar. 31, 2025
Credit Facility [Member] | Notes Issued November 5, 2015 and Due November 5, 2022 [Member]
Subsequent Event [Line Items]
Revolving credit facility, maturity date		Nov. 05, 2022
Credit facility, aggregate outstanding principal	60,000,000.0
Credit Facility [Member] | Notes Issued March 17, 2021 and Due March 17, 2028 [Member]
Subsequent Event [Line Items]
Revolving credit facility, maturity date		Mar. 17, 2028
Credit facility, aggregate outstanding principal	40,000,000.0
Credit Facility [Member] | Notes Issued June 16, 2021 and Due June 16, 2026 [Member]
Subsequent Event [Line Items]
Revolving credit facility, maturity date		Jun. 16, 2026
Credit facility, aggregate outstanding principal	60,000,000.0
Credit Facility [Member] | One or More Tranches [Member]
Subsequent Event [Line Items]
Revolving credit facility, available maximum borrowing capacity	950,000,000.0
Letters of Credit [Member]
Subsequent Event [Line Items]
Credit facility, maximum	40,000,000.0
Swingline Loans [Member]
Subsequent Event [Line Items]
Credit facility, maximum	20,000,000.0
Unsecured revolving credit facility before Renewal [Member]
Subsequent Event [Line Items]
Credit facility, maximum	$ 420,000,000.0