Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Changes in Assets and Liabilities Measured at Fair Value on Recurring Basis

The Company’s assets and liabilities measured at fair value, excluding the assets and liabilities of consolidated sponsored investment products discussed in Note 19, on a recurring basis as of December 31, 2014 and December 31, 2013 by fair value hierarchy level were as follows:

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

December 31, 2013
	Level 1		Level 2		Level 3		Total
($ in thousands)
Assets
Cash equivalents	$	270,262	$	—	$	—	$	270,262
Marketable securities trading:
Sponsored funds		17,904		—		—		17,904
Equity securities		8,379		—		—		8,379
Marketable securities available for sale:
Sponsored closed-end funds		2,685		—		—		2,685
Other investments
Nonqualified retirement plan assets		4,220		—		—		4,220
Total assets measured at fair value	$	303,450	$	—	$	—	$	303,450