Employee Long Term Incentive Plan - Additional Information (Detail) (USD $)	12 Months Ended
Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
The estimated fair value	$ 1,500,000
Dividend yield	0.00%
Share-based compensation expense	2,200,000	2,300,000	2,500,000
Unrecognized compensation cost	3,100,000
Weighted average remaining contractual term	1 year 8 months 12 days
Class D Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative amount of units vested	3,564	2,531
Dividend yield
Class D Units [Member] \| Time-Vesting Interests [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units vesting on first anniversary	20.00%
Units vesting monthly following the first anniversary	80.00%
Number of years required for remaining units to be vested under vesting condition	4 years
Period for non vested units for automatic forfeiture without consideration	8 years
Fair value of time-vesting units	$ 600,000	$ 1,600,000	$ 1,100,000
Weighted-average grant-date fair value	$ 1,368	$ 2,786	$ 3,761

Number of periods required for remaining units to be vested under vesting condition.

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- Definition

Period for non vested units for automatic forfeiture without consideration.

+ References

No definition available.

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Total Fair Value

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No definition available.

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options vested cumulative amount.

+ References

No definition available.

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- Definition

Vesting percentage of class units to be vested on first year.

+ References

No definition available.

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- Definition

Vesting percentage of remaining class units required to be vested during specified period.

+ References

No definition available.

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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)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

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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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-Paragraph 2

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

No definition available.

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

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-Paragraph 2

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

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- Definition

Weighted average remaining contractual term for equity-based awards excluding options, 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 50

-Paragraph 2

-Subparagraph (e)(1)

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

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(iii)

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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

+ 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)

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