Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 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 11, on a recurring basis as of June 30, 2014 and December 31, 2013 by fair value hierarchy level were as follows:

June 30, 2014

	Level 1		Level 2		Level 3		Total
($ in thousands)
Assets
Cash equivalents	$	167,586	$	—	$	—	$	167,586
Marketable securities trading:
Sponsored funds		43,981		—		—		43,981
Equity securities		9,233		—		—		9,233
Marketable securities available for sale:
Sponsored funds		3,189		—		—		3,189
Other investments:
Nonqualified retirement plan assets		4,546		—		—		4,546
Total assets measured at fair value	$	228,535	$	—	$	—	$	228,535

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 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