CONDENSED CONSOLIDATED STATEMENTS OF INCOME UNAUDITED (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenues
Investment advisory and incentive fees	$ 65,244	$ 50,249	$ 197,407	$ 149,862
Institutional research services	3,421	4,005	11,311	11,953
Distribution fees and other income	11,486	8,189	33,419	23,125
Total revenues	80,151	62,443	242,137	184,940
Expenses
Compensation	32,010	26,661	99,792	78,745
Management fee	1,387	3,540	8,126	7,368
Distribution costs	11,091	7,710	34,108	21,840
Other operating expenses	5,002	5,023	18,193	15,528
Total expenses (a)	49,490	42,934	160,219	123,481
Operating income	30,661	19,509	81,918	61,459
Other income (expense)
Net gain/(loss) from investments	(16,152)	13,916	(3,743)	11,351
Interest and dividend income	1,823	2,012	5,620	3,916
Interest expense	(4,418)	(3,295)	(10,688)	(9,993)
Total other income (expense), net	(18,747)	12,633	(8,811)	5,274
Income before income taxes	11,914	32,142	73,107	66,733
Income tax provision	4,745	11,686	26,978	24,381
Net income	7,169	20,456	46,129	42,352
Net income attributable to noncontrolling interests	(530)	350	140	471
Net income attributable to GAMCO Investors, Inc.'s shareholders	$ 7,699	$ 20,106	$ 45,989	$ 41,881
Net income attributable to GAMCO Investors, Inc.'s shareholders per share:
Basic (in dollars per share)	$ 0.29	$ 0.75	$ 1.72	$ 1.55
Diluted (in dollars per share)	$ 0.29	$ 0.73	$ 1.72	$ 1.53
Weighted average shares outstanding:
Basic (in shares)	26,496	26,828	26,686	26,996
Diluted (in shares)	26,576	28,364	26,772	27,818
Dividends declared: (in dollars per share)	$ 0.04	$ 0.93	$ 0.11	$ 0.99