Stock Repurchase Program (Detail) - Common Stock - Stock Repurchase Program - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Mar. 30, 2021
Equity, Class of Treasury Stock [Line Items]
Authorized amount of repurchase, up to							$ 1,000
Automatic increase per calendar month							$ 1,000
Federal corporate excise tax repurchase percentage	1.00%
Share repurchase value minimum threshold exempt from tax	$ 1,000
Stock repurchased (in shares)		74,486	373,965	1,092,046,000	1,763,666,000
Treasury Stock
Equity, Class of Treasury Stock [Line Items]
Excise tax liabilities incurred during the period and capitalized				$ 20		$ 45
Restricted Cash
Equity, Class of Treasury Stock [Line Items]
Total cash		$ 383		$ 383