Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net income	$ 208,034	$ 206,650	$ 233,320
Depreciation	22,586	21,471	21,902
Amortization	33,258	27,288	24,048
Equity in earnings of unconsolidated affiliates	(98,671)	(105,818)	(99,457)
Distributions received from unconsolidated affiliate	92,227	109,273	72,060
Stock-based compensation	15,736	14,112	26,783
Provision for losses on receivables	(119)	(271)	(1,004)
Deferred income tax expense	(1,191)	1,001	6,461
Net realized gains from investments	(14,067)	(3,360)	(48,533)
Change in other long-term liabilities	(1,244)	2,631	(81)
Change in other assets	(619)	315	(379)
Other	6,680	(3,148)	2,852
Increase (Decrease) in Restricted cash for broker-dealer operations	0	0	(16,000)
Increase (Decrease) in Receivables from regulated investment companies	5,284	(3,482)	1,148
Increase (Decrease) in Receivables	30,852	11,474	11,032
Increase (Decrease) in Other Current Assets	282	1,689	1,101
Increase (Decrease) in Accounts Payable	9,249	(2,583)	1,734
Increase (Decrease) in Accrued Liabilities	21,627	(1,340)	(13,847)
Increase (Decrease) in Deferred Revenue	422	422	748
Adjustments to reconcile net income to net cash provided by operating activities	49,456	50,312	(3,994)
Net cash provided by operating activities	257,490	256,962	229,326
Cash flows from investing activities:
Additions to restricted cash	0	(2,000)	0
Additions to property and equipment	(23,070)	(12,271)	(13,611)
Additions to capitalized software	(31,004)	(40,954)	(38,729)
Purchases of marketable securities	(33,662)	(73,960)	(39,085)
Prepayments and maturities of marketable securities	53,352	61,582	58,174
Sales of marketable securities	54,830	38,247	28,859
Purchases of other investments	(3,819)	(7,500)	0
Sales of other investments	0	4,906	0
LSV and LSV Employee Group cash balances, net (A)	0	0	(37,083)
Net cash provided by (used in) investing activities	16,627	(31,950)	(41,475)
Cash flows from financing activities:
Payments on long-term debt	0	(95,000)	(138,000)
Purchase and retirement of common stock	(157,543)	(208,932)	(119,775)
Proceeds from issuance of common stock	49,439	24,221	28,096
Tax benefit on stock options exercised	583	1,434	1,877
Payment of dividends	(135,335)	(22,041)	(54,634)
Net cash used in financing activities	(242,856)	(300,318)	(282,436)
Net increase (decrease) in cash and cash equivalents	31,261	(75,306)	(94,585)
Cash and cash equivalents, beginning of period	420,986	496,292	590,877
Cash and cash equivalents, end of period	452,247	420,986	496,292
Interest Paid	367	559	1,488
Income Taxes Paid	113,160	116,483	145,553
Dividends Payable	$ 0	$ 26,518	$ 0