Schedule of Stock Option Aggregated Intrinsic Value Information (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
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Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
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Share-based Compensation Arrangement by Share-based Payment Award | |||
Exercised | $ 3,729 | $ 7,255 | $ 17,847 |
Outstanding | 12,468 | 11,729 | 17,936 |
Vested and expected to vest | 12,468 | 11,729 | 17,936 |
Exercisable | $ 10,217 | $ 10,716 | $ 16,101 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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