Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
REVENUE
Investment banking and other advisory fees	$ 408,726	$ 334,916
Asset management fees	338,096	272,924
Interest income	2,710	1,654
Other	18,673	27,926
Total revenue	768,205	637,420
Interest expense	13,507	13,956
Net revenue	754,698	623,464
OPERATING EXPENSES
Compensation and benefits	405,047	361,801
Occupancy and equipment	30,238	27,484
Marketing and business development	25,659	19,752
Technology and information services	33,252	24,024
Professional services	12,431	11,462
Fund administration and outsourced services	35,184	15,913
Amortization and other acquisition-related costs	866	3,574
Other	26,193	9,257
Total operating expenses	568,870	473,267
OPERATING INCOME	185,828	150,197
Provision for income taxes	24,167	39,767
NET INCOME	161,661	110,430
LESS - NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	1,969	2,877
NET INCOME ATTRIBUTABLE TO LAZARD LTD	$ 159,692	$ 107,553
WEIGHTED AVERAGE SHARES OF COMMON STOCK OUTSTANDING:
Basic	119,930,106	122,815,163
Diluted	132,142,394	132,689,375
NET INCOME PER SHARE OF COMMON STOCK:
Basic	$ 1.33	$ 0.88
Diluted	1.21	0.81
DIVIDENDS DECLARED PER SHARE OF COMMON STOCK	$ 1.71	$ 1.58