Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Flows from Operating Activities:
Net Income	$ 28,737	$ 41,559
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation expense, intangible asset and other amortization	3,436	3,340
Stock-based compensation	6,433	4,510
Excess tax benefits from stock-based compensation	(1,328)	(583)
Amortization of deferred commissions	5,339	9,578
Payments of deferred commissions	(2,040)	(8,490)
Equity in earnings of equity method investments	(669)	(61)
Realized and unrealized gains on trading securities, net	(609)	(2,751)
Realized and unrealized losses (gains) on investments of consolidated sponsored investment products, net	2,315	(6,666)
Sales of trading securities, net	8,131	20,576
Purchases of investments by consolidated sponsored investment products, net	(39,993)	(150,473)
Sales of securities sold short by consolidated sponsored investment products, net	2,040	10,501
Deferred taxes, net	636	7,314
Changes in operating assets and liabilities:
Cash pledged or on deposit of consolidated sponsored investment products	(3,489)	(11,958)
Accounts receivable, net and other assets	4,665	(5,022)
Other assets of consolidated sponsored investment products	(1,855)	4,455
Accrued compensation and benefits, accounts payable, accrued liabilities and other liabilities	(15,104)	(5,306)
Liabilities of consolidated sponsored investment products	4,909	(1,606)
Net cash provided by (used in) operating activities	1,554	(91,083)
Cash Flows from Investing Activities:
Capital expenditures	(2,978)	(1,459)
Change in cash and cash equivalents of consolidated sponsored investment products due to deconsolidation		(366)
Asset acquisitions and purchases of other investments	(1,601)
Cash acquired in business combination	89
Purchases of available-for-sale securities	(111)	(204)
Net cash used in investing activities	(4,601)	(2,029)
Cash Flows from Financing Activities:
Borrowings of proceeds from short sales by consolidated sponsored investment products	831
Dividends paid	(8,167)
Repurchases of common shares	(28,000)	(12,500)
Proceeds from exercise of stock options	61	391
Taxes paid related to net share settlement of restricted stock units	(4,841)	(9,271)
Excess tax benefits from stock-based compensation	1,328	583
Contributions of noncontrolling interests, net	34,237	13,092
Net cash used in financing activities	(4,551)	(7,705)
Net decrease in cash and cash equivalents	(7,598)	(100,817)
Cash and cash equivalents, beginning of period	203,304	271,545
Cash and Cash Equivalents, end of period	195,706	170,728
Non-Cash Investing Activities:
Change in accrual for capital expenditures	(465)	99
Investment in acquired business	4,800
Non-Cash Financing Activities:
Decrease to noncontrolling interest due to consolidation (deconsolidation) of consolidated sponsored investment products, net	(1,569)	(45,003)
Dividends payable	$ 4,048	$ 4,179