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Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Carry forward tax losses | $ 188,301 | $ 191,561
Employee stock based compensation | 30,835 | 27,517
Other | 81,959 | 60,887
Deferred tax assets before valuation allowance | 301,095 | 279,965
Valuation allowance | (181,947) | (192,332)
Deferred tax asset | 119,148 | 87,633
Intangible assets | (8,461) | (8,045)
Undistributed earnings of subsidiary | (9,925) | (11,435)
Other | (13) | (2,682)
Deferred tax liability | (18,399) | (22,162)
Deferred tax asset, net | $ 100,749 | $ 65,471

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