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Income Taxes - Summary of Tax Effects of Temporary Differences (Detail) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Deferred tax assets: |  |
Intangible assets | $ 10,706 | $ 19,348
Net operating losses | 16,769 | 20,272
Compensation accruals | 7,681 | 8,854
Capitalized transaction costs | 5,849 | 10,022
Unrealized loss/(gain) | 1,473 | 5,291
Capital losses | 870 | 417
Other | 1,675 | 977
Gross deferred tax assets | 45,023 | 65,181
Valuation allowance | (3,088) | (5,731)
Gross deferred tax assets after valuation allowance | 41,935 | 59,450
Deferred tax liabilities: |  |
Intangible assets | (9,507) | (11,915)
Gross deferred tax liabilities | (9,507) | (11,915)
Deferred tax assets, net | $ 32,428 | $ 47,535

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