EQUITY ROLL FORWARD (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			$ 559,465
Net income	$ 23,747	$ 21,026	61,514	$ 57,440
Adjustment to Impo redemption value			(834)
Dividends on common stock			(13,810)
Common stock issued			3,192
Common stock repurchased			(6,193)
Share-based compensation			5,912
Noncontrolling dividend			(673)
Currency translation adjustment			12,142
Pension liability, net of tax			1,429
Equity, ending balance	622,191		622,191
Increase (Decrease) in Temporary Equity
Temporary equity, beginning balance			6,856
Net income			(47)
Adjustment to Impo redemption value			834
Currency translation adjustment			(46)
Temporary equity, ending balance	7,597		7,597
Common Stock
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			4,622
Common stock issued			16
Common stock repurchased			(21)
Share-based compensation			13
Equity, ending balance	4,630		4,630
Additional Paid in Capital
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			216,472
Common stock issued			3,176
Share-based compensation			5,899
Equity, ending balance	225,547		225,547
Retained Earnings
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			498,214
Net income			61,103
Adjustment to Impo redemption value			(834)
Dividends on common stock			(13,810)
Common stock repurchased			(6,172)
Equity, ending balance	538,501		538,501
Minimum Pension Liability
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			(51,558)
Pension liability, net of tax			1,429
Equity, ending balance	(50,129)		(50,129)
Cumulative Translation Adjustment
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			(110,050)
Currency translation adjustment			12,098
Equity, ending balance	(97,952)		(97,952)
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity
Equity, beginning balance			1,765
Net income			458
Noncontrolling dividend			(673)
Currency translation adjustment			44
Equity, ending balance	$ 1,594		1,594
Total Equity
Increase (Decrease) in Stockholders' Equity
Net income			$ 61,561