Stockholders' Equity - Ranges of Estimated Values of Stock Options and Performance-Based Stock Options Granted (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life		6 months	6 months
Total stock-based compensation expense	$ 28,394	$ 31,976	$ 41,819
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	46.00%	46.00%	54.00%
Risk-free interest rate	0.02%	0.10%	0.16%
Expected life	3 months
Estimated fair value, (in usd per share)	$ 2.05	$ 1.87	$ 1.73
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	51.00%	49.00%	57.00%
Risk-free interest rate	0.11%	0.14%	0.17%
Expected life	6 months
Estimated fair value, (in usd per share)	$ 2.57	$ 3.00	$ 2.63
Employee stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	52.00%
Risk-free interest rate	1.30%
Expected life	4 years 3 months
Estimated fair value, (in usd per share)	$ 3.85
Total stock-based compensation expense	$ 702	$ 2,792	$ 8,436
Employee stock options [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility			65.00%
Risk-free interest rate			0.70%
Expected life			4 years
Estimated fair value, (in usd per share)			$ 3.75
Employee stock options [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility			68.00%
Risk-free interest rate			1.00%
Expected life			5 years 3 months
Estimated fair value, (in usd per share)			$ 3.76

Share Based Compensation Arrangement by Share Based Payment Award Estimated Fair Value of Common Stock per Share

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.D.2)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over 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 (f)(2)(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ 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 (f)(2)(iv)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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