Equity-Based Compensation (Summary of Outstanding and Exercisable Sars Options) (Detail) (USD $)	9 Months Ended
Sep. 29, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Shares, Outstanding	1,578,416
Number of Shares, Exercisable	1,572,730
Aggregate intrinsic value, Outstanding	$ 1,744,000
Aggregate intrinsic value, Exercisable	1,643,000
Weighted-average remaining contractual term, Outstanding	3 years 8 months 12 days
Weighted-average remaining contractual term, Exercisable	3 years 8 months 12 days
Stock Option And Stock Appreciation Rights (SARs) [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Shares, Outstanding	1,614,393
Number of Shares, Exercisable	553,996
Aggregate intrinsic value, Outstanding	10,972,000
Aggregate intrinsic value, Exercisable	$ 6,257,000
Weighted-average remaining contractual term, Outstanding	8 years 1 month 6 days
Weighted-average remaining contractual term, Exercisable	7 years 4 months 24 days
$ 19.56-$19.56 [Member] \| Stock Option And Stock Appreciation Rights (SARs) [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 19.56
Range of Exercise Prices, Maximum	$ 19.56
Number of Shares, Outstanding	368,856
Weighted-Average Remaining Contractual Life, Outstanding (years)	6 years 7 months 6 days
Weighted-Average Exercise Price, Outstanding	$ 19.56
Number of Shares, Exercisable	256,826
Weighted-Average Exercise Price, Exercisable	$ 19.56
$ 21.83-$27.50 [Member] \| Stock Option And Stock Appreciation Rights (SARs) [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 21.83
Range of Exercise Prices, Maximum	$ 27.50
Number of Shares, Outstanding	56,764
Weighted-Average Remaining Contractual Life, Outstanding (years)	7 years 1 month 6 days
Weighted-Average Exercise Price, Outstanding	$ 24.82
Number of Shares, Exercisable	46,761
Weighted-Average Exercise Price, Exercisable	$ 24.64
$ 27.82-$27.82 [Member] \| Stock Option And Stock Appreciation Rights (SARs) [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 27.82
Range of Exercise Prices, Maximum	$ 27.82
Number of Shares, Outstanding	400,461
Weighted-Average Remaining Contractual Life, Outstanding (years)	7 years 7 months 6 days
Weighted-Average Exercise Price, Outstanding	$ 27.82
Number of Shares, Exercisable	127,518
Weighted-Average Exercise Price, Exercisable	$ 27.82
$ 28.33-$37.15 [Member] \| Stock Option And Stock Appreciation Rights (SARs) [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 28.33
Range of Exercise Prices, Maximum	$ 37.15
Number of Shares, Outstanding	61,725
Weighted-Average Remaining Contractual Life, Outstanding (years)	9 years 7 days
Weighted-Average Exercise Price, Outstanding	$ 33.37
Number of Shares, Exercisable	25,976
Weighted-Average Exercise Price, Exercisable	$ 34.82
$ 38.79-$42.36 [Member] \| Stock Option And Stock Appreciation Rights (SARs) [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 38.79
Range of Exercise Prices, Maximum	$ 42.36
Number of Shares, Outstanding	726,587
Weighted-Average Remaining Contractual Life, Outstanding (years)	9 years 1 month 13 days
Weighted-Average Exercise Price, Outstanding	$ 40.09
Number of Shares, Exercisable	96,915
Weighted-Average Exercise Price, Exercisable	$ 41.69
$ 1.29-$36.49 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 1.29
Range of Exercise Prices, Maximum	$ 36.49
Number of Shares, Outstanding	422,223
Weighted-Average Remaining Contractual Life, Outstanding (years)	4 years 9 months 11 days
Weighted-Average Exercise Price, Outstanding	$ 32.84
Number of Shares, Exercisable	416,537
Weighted-Average Exercise Price, Exercisable	$ 33.02
$ 36.80-$41.25 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 36.80
Range of Exercise Prices, Maximum	$ 41.25
Number of Shares, Outstanding	378,221
Weighted-Average Remaining Contractual Life, Outstanding (years)	4 years 6 months 22 days
Weighted-Average Exercise Price, Outstanding	$ 39.78
Number of Shares, Exercisable	378,221
Weighted-Average Exercise Price, Exercisable	$ 39.78
$ 42.28-$45.62 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 42.28
Range of Exercise Prices, Maximum	$ 45.62
Number of Shares, Outstanding	401,316
Weighted-Average Remaining Contractual Life, Outstanding (years)	2 years 11 months 27 days
Weighted-Average Exercise Price, Outstanding	$ 44.51
Number of Shares, Exercisable	401,316
Weighted-Average Exercise Price, Exercisable	$ 44.51
$ 46.18-$51.62 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 46.18
Range of Exercise Prices, Maximum	$ 51.62
Number of Shares, Outstanding	374,856
Weighted-Average Remaining Contractual Life, Outstanding (years)	2 years 2 months 12 days
Weighted-Average Exercise Price, Outstanding	$ 48.63
Number of Shares, Exercisable	374,856
Weighted-Average Exercise Price, Exercisable	$ 48.63
$ 53.92-$53.92 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 53.92
Range of Exercise Prices, Maximum	$ 53.92
Number of Shares, Outstanding	1,800
Weighted-Average Remaining Contractual Life, Outstanding (years)	1 year 7 months 28 days
Weighted-Average Exercise Price, Outstanding	$ 53.92
Number of Shares, Exercisable	1,800
Weighted-Average Exercise Price, Exercisable	$ 53.92

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.

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- Definition

Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and 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

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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-Section 50

-Paragraph 2

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ 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)-(ii)

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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