Valuation and Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 03, 2014		Dec. 28, 2012		Dec. 30, 2011
Allowance For Bad Debt
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 933		$ 819		$ 702
Provision Charged to Expense	515		483		709
Provision Charged to Revenues	0		0		0
Written-off Net of Recoveries	(506)	[1]	(369)	[1]	(592)	[1]
Balance at End of Year	942		933		819
Allowance For Contract Losses
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	1,733		1,520		1,424
Provision Charged to Expense	0		0		0
Provision Charged to Revenues	1,189		1,280		1,278
Written-off Net of Recoveries	(1,093)	[1]	(1,067)	[1]	(1,182)	[1]
Balance at End of Year	$ 1,829		$ 1,733		$ 1,520

[1] Balance includes currency translation adjustments.