Investment In Unconsolidated Affiliates Investment In Unconsolidated Affiliates (Condensed Balance Sheets of LSV) (Details) (LSV Asset Management [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
LSV Asset Management [Member]
Equity Method Investment, Summarized Financial Information, Current Assets	$ 145,367	$ 136,601
Equity Method Investment, Summarized Financial Information, Noncurrent Assets	3,120	3,880
Equity Method Investment, Summarized Financial Information, Assets	148,487	140,481
Equity Method Investment, Summarized Financial Information, Current Liabilities	17,869	13,933
Equity Method Investment Summarized Financial Information, Equity	130,618	126,548
Equity Method Investment, Summarized Financial Information, Liabilities and Equity	$ 148,487	$ 140,481