Investment In Unconsolidated Affiliates (Condensed Statements of Operations of LSV) (Details) - LSV Asset Management [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Revenues	$ 399,462	$ 427,653	$ 422,064
Net income	$ 323,381	$ 352,845	$ 356,824