EQUITY ROLL FORWARD (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			$ 598,983
Net income	$ 21,026	$ 22,805	57,440	$ 67,684
Equity, ending balance	553,508		553,508
Increase (Decrease) in Temporary Equity
Temporary equity, beginning balance			6,420
Net income			188
Adjustment to Impo redemption value			369
Currency translation adjustment			(541)
Temporary equity, ending balance	6,436		6,436
Common Stock
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			4,759
Common stock issued			7
Common stock repurchased			(145)
Share-based compensation			15
Equity, ending balance	4,636		4,636
Additional Paid in Capital
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			207,446
Common stock issued			1,233
Share-based compensation			4,564
Tax benefit of stock options exercised			1,542
Equity, ending balance	214,785		214,785
Retained Earnings
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			492,548
Net income			56,784
Adjustment to Impo redemption value			(369)
Dividends on common stock			(13,570)
Common stock repurchased			(43,185)
Equity, ending balance	492,208		492,208
Minimum Pension Liability
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			(56,124)
Pension liability, net of tax			1,963
Equity, ending balance	(54,161)		(54,161)
Cumulative Translation Adjustment
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			(51,789)
Currency translation adjustment			(53,851)
Equity, ending balance	(105,640)		(105,640)
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			2,143
Net income			468
Noncontrolling dividend			(823)
Currency translation adjustment			(108)
Equity, ending balance	1,680		1,680
Total Equity
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			598,983
Net income			57,252
Adjustment to Impo redemption value			(369)
Dividends on common stock			(13,570)
Common stock issued			1,240
Common stock repurchased			(43,330)
Share-based compensation			4,579
Tax benefit of stock options exercised			1,542
Noncontrolling dividend			(823)
Currency translation adjustment			(53,959)
Pension liability, net of tax			1,963
Equity, ending balance	$ 553,508		$ 553,508