Consolidated Statements Of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income	Non-controlling Interests
Beginning balance (in shares) at Dec. 30, 2012		44,763			4,036
Beginning balance at Dec. 30, 2012	$ 354,309	$ 4,476	$ 424,715	$ (4,356)	$ (71,520)	$ 306	$ 688
Net loss	(18,927)			(18,928)			1
Exercise of stock-based compensation and awards released (in shares)		721
Exercise of stock-based compensation and awards released	2,561	$ 72	2,489
Tax benefit on stock-based compensation	82		82
Stock-based compensation expense	6,369		6,369
Deferred compensation plan	681		681
Sale of interest in subsidiary	(516)						(516)
Change in realized and unrealized loss on derivative hedges, net of tax	(21)					(21)
Pension liability adjustments	1,658					1,658
Actuarial losses on other postretirement benefits, net of tax	0
Foreign currency translation adjustment	129					302	(173)
Ending balance (in shares) at Dec. 29, 2013		45,484			4,036
Ending balance at Dec. 29, 2013	346,325	$ 4,548	434,336	(23,284)	$ (71,520)	2,245	0
Net loss	10,953			10,953
Exercise of stock-based compensation and awards released (in shares)		356
Exercise of stock-based compensation and awards released	943	$ 36	907
Tax benefit on stock-based compensation	(14)		(14)
Stock-based compensation expense	5,781		5,781
Deferred compensation plan	872		872
Change in realized and unrealized loss on derivative hedges, net of tax	0
Pension liability adjustments	(17,263)					(17,263)
Actuarial losses on other postretirement benefits, net of tax	0
Foreign currency translation adjustment	(19,666)					(19,666)
Ending balance (in shares) at Dec. 28, 2014		45,840			4,036
Ending balance at Dec. 28, 2014	327,931	$ 4,584	441,882	(12,331)	$ (71,520)	(34,684)	$ 0
Net loss	(26,215)			(26,215)
Exercise of stock-based compensation and awards released (in shares)		463
Exercise of stock-based compensation and awards released	433	$ 46	387
Tax benefit on stock-based compensation	(295)		(295)
Stock-based compensation expense	5,480		5,480
Deferred compensation plan	1,019		1,019
Change in realized and unrealized loss on derivative hedges, net of tax	(125)					(125)
Dividend declared ($0.50 per share)	$ (21,384)		(21,384)
Repurchase of common stock (in shares)	889				889
Repurchase of common stock	$ (6,634)				$ (6,634)
Pension liability adjustments	16,804					16,804
Actuarial losses on other postretirement benefits, net of tax	(1,014)					(1,014)
Foreign currency translation adjustment	(21,208)					(21,208)
Ending balance (in shares) at Dec. 27, 2015		46,303			4,925
Ending balance at Dec. 27, 2015	$ 274,792	$ 4,630	$ 427,089	$ (38,546)	$ (78,154)	$ (40,227)	$ 0