Consolidated Statements of Cash Flows (unaudited) - USD ($)	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 19,555,847	$ 12,942,129
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	282,565	285,823
Share-based compensation	2,154,024	1,851,702
Decrease in accounts receivable	1,714,531	347,488
Change in current income taxes	2,150,248	4,167,325
Change in deferred income taxes	(490,645)	(492,725)
Net (gains) losses on investments	(13,053,857)	2,994,792
Net change in securities held by Consolidated Funds	18,908,654	(35,143,135)
Decrease in accrued incentive compensation	(18,598,871)	(13,729,303)
Increase in deferred compensation	4,389,652	3,513,366
Other changes in assets and liabilities	(934,288)	4,438,764
Net cash provided by (used in) operating activities	16,077,860	(18,823,774)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(91,015)	(144,948)
Purchase of Company sponsored investments	(4,560,693)	(3,143,561)
Proceeds from sale of Company sponsored investments	2,683,935	1,148,162
Net cash used in investing activities	(1,967,773)	(2,140,347)
CASH FLOWS FROM FINANCING ACTIVITIES:
Value of shares withheld related to employee tax withholding	0	(501,564)
Net subscriptions received from redeemable noncontrolling interest holders	1,516,063	3,661,843
Repurchase of common stock	(7,907,055)	0
Net cash (used in) provided by financing activities	(6,390,992)	3,160,279
CASH(a)
Net change during the period	7,719,095	(17,803,842)
At beginning of period	84,430,059	76,602,108
At end of period	92,149,154	58,798,266
Supplemental cash flow information:
Income taxes paid	4,203,130	27,500
Supplemental disclosure of non-cash transactions:
Common stock issued as incentive compensation	3,655,296	4,109,197
Charitable donation of corporate investments	0	1,989,803
Net subscriptions (redemptions) of ETF shares for marketable securities	$ (3,244,940)	$ 1,524,340

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Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration