Income Taxes - Summary of Tax Effects of Temporary Differences (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Intangible assets	$ 19,348	$ 27,728
Net operating losses	20,272	20,591
Compensation accruals	8,854	7,804
Capitalized transaction costs	10,022	8,704
Unrealized loss	5,291	12,157
Other	1,394	118
Gross deferred tax assets	65,181	77,102
Valuation allowance	(5,731)	(10,855)
Gross deferred tax assets after valuation allowance	59,450	66,247
Deferred tax liabilities:
Intangible assets	(11,915)	(12,104)
Gross deferred tax liabilities	(11,915)	(12,104)
Deferred tax assets, net	$ 47,535	$ 54,143