Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - Valuation and Qualifying Accounts and Reserves - USD ($) $ in Thousands		12 Months Ended
		Jan. 03, 2016	Dec. 28, 2014	Dec. 29, 2013
Allowance for Doubtful Accounts [Member]
Year Ended:
Balance, at beginning of year		$ 5,896	$ 7,646	$ 8,818
Charged to costs and expenses	[1]	212	(730)	253
Charged to other accounts		0	0	0
Deductions	[2]	1,629	1,020	1,425
Balance, at end of year		4,479	5,896	7,646
Business Restructuring Reserves [Member]
Year Ended:
Balance, at beginning of year		7,179	519	4,350
Charged to costs and expenses	[1]	(481)	9,315	0
Charged to other accounts	[3]	0	2,717	0
Deductions	[4]	6,594	5,372	3,831
Balance, at end of year		104	7,179	519
Warranty and Sales Allowance Reserves [Member]
Year Ended:
Balance, at beginning of year		3,954	4,935	4,331
Charged to costs and expenses	[1]	2,584	457	1,806
Charged to other accounts		0	0	0
Deductions	[5]	1,779	1,438	1,202
Balance, at end of year		4,759	3,954	4,935
Inventory Valuation Reserve [Member]
Year Ended:
Balance, at beginning of year		14,784	13,416	12,946
Charged to costs and expenses	[1]	3,758	4,819	3,445
Charged to other accounts		0	0	0
Deductions	[6]	3,075	3,451	2,975
Balance, at end of year		$ 15,467	$ 14,784	$ 13,416

[1] Includes changes in foreign currency exchange rates.

[2] Write off of bad debt, and recovering of previously provided for amounts.

[3] Reduction of asset carrying value.

[4] Cash payments.

[5] Represents credits and costs applied against reserve and adjustments to reflect actual exposure.

[6] Represents costs applied against reserve and adjustments to reflect actual exposure.