Schedule I - Condensed Statements of Operations (Parent Company Only) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
REVENUE
Total revenue	$ 2,855,093	$ 3,273,816	$ 2,646,769
OPERATING EXPENSES
Professional services	69,535	77,702	66,304
Other	44,852	45,318	38,931
Total operating expenses	2,256,723	2,469,200	2,063,997
NET INCOME ATTRIBUTABLE TO LAZARD LTD	357,517	528,064	402,461
Parent Company [Member]
REVENUE
Equity in earnings of subsidiaries	238,987	410,550	274,461
Interest and other income	120,733	119,412	129,912
Total revenue	359,720	529,962	404,373
OPERATING EXPENSES
Professional services	2,083	1,792	1,851
Other	120	106	61
Total operating expenses	2,203	1,898	1,912
NET INCOME ATTRIBUTABLE TO LAZARD LTD	$ 357,517	$ 528,064	$ 402,461