EQUITY ROLL FORWARD (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Dec. 28, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance as of December 28, 2013	$ 616,177		$ 598,216
Net income	17,421	15,615
Dividends on common stock	(3,709)
Common stock issued	635
Common stock repurchased or received for stock options exercised	(1,581)
Share-based compensation	1,392
Tax benefit of stock options exercised	1,254
Currency translation adjustment	2,326
Pension liability, net of tax	488
Balance as of March 29, 2014	616,177		598,216
Common
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance as of December 28, 2013	4,769		4,771
Common stock issued	3
Common stock repurchased or received for stock options exercised	(4)
Share-based compensation	(1)
Balance as of March 29, 2014	4,769		4,771
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance as of December 28, 2013	198,089		194,810
Common stock issued	632
Share-based compensation	1,393
Tax benefit of stock options exercised	1,254
Balance as of March 29, 2014	198,089		194,810
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance as of December 28, 2013	462,526		450,855
Net income	16,957
Dividends on common stock	(3,709)
Common stock repurchased or received for stock options exercised	(1,577)
Balance as of March 29, 2014	462,526		450,855
Minimum Pension Liability
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance as of December 28, 2013	(38,369)		(38,707)
Pension liability, net of tax	488
Other	(150)
Balance as of March 29, 2014	(38,369)		(38,707)
Cumulative Translation Adjustment
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance as of December 28, 2013	(13,556)		(16,022)
Currency translation adjustment	2,316
Other	150
Balance as of March 29, 2014	(13,556)		(16,022)
Non-controlling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance as of December 28, 2013	2,718		2,509
Net income	199
Currency translation adjustment	10
Balance as of March 29, 2014	2,718		2,509
parent and noncontrolling interest [Domain]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	17,156
Redeemable Non-controlling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance as of December 28, 2013	5,288		5,171
Net income	265
Currency translation adjustment	(148)
Balance as of March 29, 2014	$ 5,288		$ 5,171