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Stock-Based Compensation - Stock Option Activity Under Equity Incentive Plans (Detail) - Stock Options [Member] $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of Shares, Outstanding, Beginning balance | shares | 18,782
Number of Shares, Options granted | shares | 3,368
Number of Shares, Options exercised | shares | (2,337)
Number of Shares, Options forfeited and canceled | shares | (400)
Number of Shares, Outstanding, Ending balance | shares | 19,413
Number of Shares, Vested and Expected to Vest | shares | 18,970
Number of Shares, Exercisable | shares | 12,783
Weighted-Average Exercise Price per Share, Outstanding, Beginning balance | $ / shares | $ 11.22
Weighted-Average Exercise Price per Share, Options granted | $ / shares | 13.92
Weighted-Average Exercise Price per Share, Options exercised | $ / shares | 8.03
Weighted-Average Exercise Price per Share, Options forfeited and Canceled | $ / shares | 13.97
Weighted-Average Exercise Price per Share, Outstanding, Ending balance | $ / shares | 12.01
Weighted-Average Exercise Price per Share, Vested and expected to vest | $ / shares | 11.97
Weighted-Average Exercise Price per Share, Exercisable | $ / shares | $ 10.94
Weighted-Average Remaining Contractual Life, Outstanding | 4 years 7 months 10 days
Weighted-Average Remaining Contractual Life, Vested and expected to Vest | 4 years 6 months 18 days
Weighted-Average Remaining Contractual Life, Exercisable | 3 years 5 months 27 days
Aggregate Intrinsic Value, Outstanding | $ | $ 26,513
Aggregate Intrinsic Value, Vested and expected to Vest | $ | 26,485
Aggregate Intrinsic Value, Exercisable | $ | $ 25,684

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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