Fair Value Measurements (Assets And Liabilities Measured At Fair Value On Recurring Basis) (Detail) (USD $)	6 Months Ended		12 Months Ended
	Jun. 29, 2012		Dec. 30, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Maximum payment under all contingent consideration arrangements	13,600,000
Contingent consideration arrangements, years	3
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, discount rate	0.0000		0.0006
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, discount rate	0.035		0.035
Other Current Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total contingent consideration liability	4,500,000		4,500,000
Other Non Current Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total contingent consideration liability	300,000		500,000
Level I [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	11,571,000		10,537,000
Liabilities, Fair Value	11,568,000		10,534,000
Level I [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	3,000	[1]	3,000	[1]
Level I [Member] | Deferred Compensation Plan Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	11,568,000	[2]	10,534,000	[2]
Level II [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	375,000		351,000
Liabilities, Fair Value	227,000		1,968,000
Level II [Member] | Derivative Financial Instruments, Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	375,000	[3]	351,000	[3]
Level III [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value	4,839,000		4,967,000
Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	11,946,000		10,888,000
Liabilities, Fair Value	16,634,000		17,469,000
Total [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	3,000	[1]	3,000	[1]
Total [Member] | Deferred Compensation Plan Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	11,568,000	[2]	10,534,000	[2]
Total [Member] | Derivative Financial Instruments, Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value	375,000	[3]	351,000	[3]
Deferred Compensation Plan Liabilities [Member] | Level I [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value	11,568,000	[2]	10,534,000	[2]
Deferred Compensation Plan Liabilities [Member] | Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value	11,568,000	[2]	10,534,000	[2]
Derivative Liabilities [Member] | Level II [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value	227,000	[3]	1,968,000	[3]
Derivative Liabilities [Member] | Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value	227,000	[3]	1,968,000	[3]
Contingent Consideration Liabilities [Member] | Level III [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value	4,839,000	[4]	4,967,000	[4]
Contingent Consideration Liabilities [Member] | Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value	4,839,000	[4]	4,967,000	[4]

[1] These investments are highly liquid investments in money market funds. The fair values are determined using observable quoted prices in active markets. Money market funds are included in Cash and cash equivalents on the Company's Condensed Consolidated Balance Sheets.

[2] The Company maintains a self-directed, non-qualified deferred compensation plan for certain executives and other highly compensated employees. The plan assets and liabilities are invested in actively traded mutual funds and individual stocks valued using observable quoted prices in active markets. Deferred compensation plan assets and liabilities are included in Other non-current assets and Other non-current liabilities on the Company's Condensed Consolidated Balance Sheets.

[3] Derivative assets and liabilities included in Level II primarily represent forward currency exchange contracts. The Company typically enters into these contracts to minimize the short-term impact of foreign currency exchange rate fluctuations on certain trade and inter-company receivables and payables. The derivatives are not designated as hedging instruments. The fair values are determined using inputs based on observable quoted prices. Derivative assets and liabilities are included in Other current assets and Other current liabilities, respectively, on the Company's Condensed Consolidated Balance Sheets.

[4] The Company has nine contingent consideration arrangements that require it to pay the former owners of certain companies it acquired. The undiscounted maximum payment under all nine arrangements is $13.6 million based on future revenues, gross margins or operating income over a 3 year period. The Company estimated the fair value of these liabilities using the expected cash flow approach with inputs being probability-weighted revenue, gross margin or operating income projections, as the case may be, and discount rates ranging from 0.00% to 3.5% for the first two quarters of fiscal 2012 and 0.06% to 3.5% for fiscal year end 2011. As of the second quarter of fiscal 2012 and fiscal year end 2011, of the total contingent consideration liability, $4.5 million was included in Other current liabilities for both periods, and $0.3 million and $0.5 million was included in Other non-current liabilities, respectively, on the Company's Condensed Consolidated Balance Sheets.