Income Taxes - Summary of Tax Effects of Temporary Differences (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Intangible assets	$ 27,728	$ 36,340
Net operating losses	20,591	21,547
Compensation accruals	7,804	6,757
Investments	8,704	8,717
Unrealized loss/(gain)	12,157	2,362
Other	118	46
Gross deferred tax assets	77,102	75,769
Valuation allowance	(10,855)	(2,397)
Gross deferred tax assets after valuation allowance	66,247	73,372
Deferred tax liabilities:
Intangible assets	(12,104)	(12,718)
Other investments	0	(492)
Gross deferred tax liabilities	(12,104)	(13,210)
Deferred tax assets, net	$ 54,143	$ 60,162