EQUITY ROLL FORWARD (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			$ 598,983
Net income	$ 16,438	$ 27,458	36,414	$ 44,879
Equity, ending balance	597,911		597,911
Increase (Decrease) in Temporary Equity
Temporary equity, beginning balance			6,420
Net income			107
Adjustment to Impo redemption value			157
Currency translation adjustment			(283)
Temporary equity, ending balance	6,401		6,401
Common Stock
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			4,759
Common stock issued			7
Common stock repurchased			(18)
Share-based compensation			15
Equity, ending balance	4,763		4,763
Additional Paid in Capital
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			207,446
Common stock issued			1,233
Share-based compensation			3,442
Tax benefit of stock options exercised			686
Equity, ending balance	212,807		212,807
Retained Earnings
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			492,548
Net income			35,959
Adjustment to Impo redemption value			(157)
Dividends on common stock			(8,960)
Common stock repurchased			(6,200)
Equity, ending balance	513,190		513,190
Minimum Pension Liability
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			(56,124)
Pension liability, net of tax			1,308
Equity, ending balance	(54,816)		(54,816)
Cumulative Translation Adjustment
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			(51,789)
Currency translation adjustment			(27,794)
Equity, ending balance	(79,583)		(79,583)
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			2,143
Net income			348
Noncontrolling dividend			(823)
Currency translation adjustment			(118)
Equity, ending balance	1,550		1,550
Total Equity
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			598,983
Net income			36,307
Adjustment to Impo redemption value			(157)
Dividends on common stock			(8,960)
Common stock issued			1,240
Common stock repurchased			(6,218)
Share-based compensation			3,457
Tax benefit of stock options exercised			686
Noncontrolling dividend			(823)
Currency translation adjustment			(27,912)
Pension liability, net of tax			1,308
Equity, ending balance	$ 597,911		$ 597,911