Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2017

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis

The Company’s assets and liabilities measured at fair value on a recurring basis, excluding the assets and liabilities of consolidated sponsored investment products and the consolidated investment product, which are separately discussed in Note 14, as of March 31, 2017 and December 31, 2016 by fair value hierarchy level were as follows:

March 31, 2017

	Level 1		Level 2		Level 3		Total
($ in thousands)
Assets
Cash equivalents	$	223,087	$	—	$	—	$	223,087
Marketable securities trading:
Sponsored mutual funds	54,998		—		—		54,998
Equity securities	11,974		—		—		11,974
Marketable securities available-for-sale:
Sponsored closed-end funds	3,623		—		—		3,623
Other investments:
Nonqualified retirement plan assets	6,186		—		—		6,186
Total assets measured at fair value	$	299,868	$	—	$	—	$	299,868

December 31, 2016

	Level 1		Level 2		Level 3		Total
($ in thousands)
Assets
Cash equivalents	$	48,620	$	—	$	—	$	48,620
Marketable securities trading:
Sponsored mutual funds	60,019		—		—		60,019
Equity securities	11,473		—		—		11,473
Marketable securities available-for-sale:
Sponsored closed-end funds	3,415		—		—		3,415
Other investments
Nonqualified retirement plan assets	5,808		—		—		5,808
Total assets measured at fair value	$	129,335	$	—	$	—	$	129,335