Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues
Investment management fees	$ 70,496	$ 71,792
Distribution and service fees	19,598	22,438
Administration and transfer agent fees	13,042	13,073
Other income and fees	695	568
Total revenues	103,831	107,871
Operating Expenses
Employment expenses	35,622	35,029
Distribution and administration expenses	24,507	27,737
Other operating expenses	16,726	10,534
Other operating expenses of consolidated sponsored investment products	818	331
Depreciation and other amortization	779	657
Amortization expense	837	957
Total operating expenses	79,289	75,245
Operating Income	24,542	32,626
Other Income (Expense)
Realized and unrealized gain on investments, net	545	1,846
Realized and unrealized gain on investments of consolidated sponsored investment products, net	2,590	36
Other income, net	435	151
Total other income, net	3,570	2,033
Interest Income (Expense)
Interest expense	(123)	(138)
Interest and dividend income	280	383
Interest and dividend income of investments of consolidated sponsored investment products	2,324	873
Total interest income, net	2,481	1,118
Income Before Income Taxes	30,593	35,777
Income tax expense	10,868	14,010
Net Income	19,725	21,767
Noncontrolling interests	(383)	171
Net Income Attributable to Common Stockholders	$ 19,342	$ 21,938
Earnings per share-Basic	$ 2.16	$ 2.41
Earnings per share-Diluted	$ 2.11	$ 2.34
Cash dividends declared per share	$ 0.45
Weighted Average Shares Outstanding-Basic (in thousands)	8,964	9,116
Weighted Average Shares Outstanding-Diluted (in thousands)	9,151	9,361