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Summary of Stock Option Activity Awards (Detail) - $ / shares | 12 Months Ended
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Dec. 31, 2016 | Dec. 26, 2015 | Dec. 27, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Outstanding at beginning of year, Shares | 5,779,597 | 8,602,626 | 22,702,534
Granted, Shares | 0 | 0 | 0
Forfeited, Shares | (108,818) | (574,967) | (1,323,664)
Exercised, Shares | (1,614,243) | (2,248,062) | (12,776,244)
Outstanding at end of year, Shares | 4,056,536 | 5,779,597 | 8,602,626
Outstanding at beginning of year, Weighted Average Exercise Price | $ 4.53 | $ 4.53 | $ 4.48
Granted, Weighted Average Exercise Price | 0 | 0 | 0
Forfeited, Weighted Average Exercise Price | 5.04 | 9.29 | 10.46
Exercised, Weighted Average Exercise Price | 1.89 | 3.34 | 3.83
Outstanding at end of year, Weighted Average Exercise Price | $ 5.56 | $ 4.53 | $ 4.53

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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 Net number of share options (or share units) granted during the period. + 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)(1) -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 Weighted average price at which option holders acquired shares when converting their stock options into shares. + References No definition available. + Details
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