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Income Taxes - Summary of Tax Effects of Temporary Differences (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | --- | ---
Deferred tax assets: |  |  |
Intangible assets | $ 43,827 | $ 51,494 |
Net operating losses | 23,705 | 49,001 |
Capital loss carryforward |  | 1,122 |
Compensation accruals | 6,280 | 4,794 |
Investments | 5,111 | 5,044 |
Other | 1,581 | 83 |
Gross deferred tax assets | 80,504 | 111,538 |
Valuation allowance | (35) | (1,611) | (3,300)
Gross deferred tax assets after valuation allowance | 80,469 | 109,927 |
Deferred tax liabilities: |  |  |
Intangible assets | (13,078) | (10,884) |
Unrealized gains | (2,357) | (1,214) |
Other investments | (534) | (906) |
Gross deferred tax liabilities | (15,969) | (13,004) |
Deferred tax assets (liability), net | $ 64,500 | $ 96,923 |

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