Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues
Investment management fees	$ 68,867	$ 74,537	$ 139,363	$ 146,329
Distribution and service fees	17,635	23,940	37,233	46,378
Administration and transfer agent fees	12,577	13,942	25,619	27,015
Other income and fees	577	330	1,272	898
Total revenues	99,656	112,749	203,487	220,620
Operating Expenses
Employment expenses	33,593	35,481	69,215	70,510
Distribution and other asset-based expenses	23,676	39,222	48,183	66,959
Other operating expenses	23,512	13,130	40,238	23,664
Other operating expenses of consolidated sponsored investment products	957	797	1,775	1,128
Depreciation and other amortization	873	670	1,652	1,327
Amortization expense	837	947	1,674	1,904
Total operating expenses	83,448	90,247	162,737	165,492
Operating Income	16,208	22,502	40,750	55,128
Other Income (Expense)
Realized and unrealized gain on investments, net	343	905	888	2,751
Realized and unrealized (loss) gain on investments of consolidated sponsored investment products, net	(3,242)	6,444	(652)	6,480
Other income, net	247	189	682	340
Total other (expense) income, net	(2,652)	7,538	918	9,571
Interest Income (Expense)
Interest expense	(121)	(125)	(244)	(263)
Interest and dividend income	302	344	582	727
Interest and dividend income of investments of consolidated sponsored investment products	3,098	1,639	5,422	2,512
Total interest income, net	3,279	1,858	5,760	2,976
Income Before Income Taxes	16,835	31,898	47,428	67,675
Income tax expense	7,823	12,106	18,691	26,116
Net Income	9,012	19,792	28,737	41,559
Noncontrolling interests	765	(249)	382	(78)
Net Income Attributable to Common Stockholders	$ 9,777	$ 19,543	$ 29,119	$ 41,481
Earnings per share-Basic	$ 1.10	$ 2.14	$ 3.26	$ 4.55
Earnings per share-Diluted	1.08	2.10	3.20	4.44
Cash dividends declared per share	$ 0.45	$ 0.45	$ 0.90	$ 0.45
Weighted Average Shares Outstanding-Basic (in thousands)	8,889	9,133	8,927	9,125
Weighted Average Shares Outstanding-Diluted (in thousands)	9,037	9,325	9,094	9,343