Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2015

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 discussed in Note 13, as of June 30, 2015 and December 31, 2014 by fair value hierarchy level were as follows:

June 30, 2015

	Level 1		Level 2		Level 3		Total
($ in thousands)
Assets
Cash equivalents	$	141,034	$	—	$	—	$	141,034
Marketable securities trading:
Sponsored funds		31,633		—		—		31,633
Equity securities		9,465		—		—		9,465
Marketable securities available for sale:
Sponsored closed-end funds		3,150		—		—		3,150
Other investments:
Nonqualified retirement plan assets		5,164		—		—		5,164
Total assets measured at fair value	$	190,446	$	—	$	—	$	190,446

December 31, 2014

	Level 1		Level 2		Level 3		Total
($ in thousands)
Assets
Cash equivalents	$	202,054	$	—	$	—	$	202,054
Marketable securities trading:
Sponsored funds		38,312		—		—		38,312
Equity securities		8,740		—		—		8,740
Marketable securities available for sale:
Sponsored closed-end funds		3,199		—		—		3,199
Other investments
Nonqualified retirement plan assets		5,063		—		—		5,063
Total assets measured at fair value	$	257,368	$	—	$	—	$	257,368