EQUITY ROLL FORWARD (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			$ 516,986
Redeemable noncontrolling interest, beginning balance			5,263
Net income	25,297	22,006	69,351	70,409
Equity, ending balance	573,910		573,910
Redeemable noncontrolling interest, ending balance	5,426		5,426
Total Equity
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			516,986
Net income			69,165
Adjustment to Impo redemptive value			(37)
Dividends on common stock			(10,814)
Noncontrolling dividend			(776)
Common stock issued			12,955
Common stock repurchased or received for stock options exercised			(12,175)
Share-based compensation			4,372
Tax benefit of stock options exercised			4,364
Currency translation adjustment			(12,116)
Pension liability, net of taxes			1,986
Equity, ending balance	573,910		573,910
Common Stock
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			4,712
Common stock issued			81
Common stock repurchased or received for stock options exercised			(35)
Share-based compensation			7
Equity, ending balance	4,765		4,765
Additional Paid in Capital
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			170,890
Common stock issued			12,883
Share-based compensation			4,365
Tax benefit of stock options exercised			4,364
Equity, ending balance	192,502		192,502
Retained Earnings
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			395,950
Net income			68,652
Adjustment to Impo redemptive value			(37)
Dividends on common stock			(10,814)
Common stock issued			(9)
Common stock repurchased or received for stock options exercised			(12,140)
Equity, ending balance	441,602		441,602
Minimum Pension Liability
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			(56,936)
Pension liability, net of taxes			1,986
Equity, ending balance	(54,950)		(54,950)
Cumulative Translation Adjustment
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			(210)
Currency translation adjustment			(12,058)
Equity, ending balance	(12,268)		(12,268)
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			2,580
Net income			513
Noncontrolling dividend			(776)
Currency translation adjustment			(58)
Equity, ending balance	2,259		2,259
Redeemable Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity
Redeemable noncontrolling interest, beginning balance			5,263
Net income			186
Adjustment to Impo redemptive value			37
Currency translation adjustment			(60)
Redeemable noncontrolling interest, ending balance	$ 5,426		$ 5,426