Consolidated Statements Of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Statement of Comprehensive Income [Abstract]
Net (loss) earnings	$ (3,991)	$ (4,075)	$ (16,042)	$ 5,650
Other comprehensive loss, net of tax:
Pension liability adjustments, net of tax (benefit) expense of ($425), ($217), $10 and $5, respectively	1,111	1,762	5,053	2,494
Foreign currency translation adjustment	(7,590)	(12,316)	(21,458)	(11,618)
Net other comprehensive income (loss)	(6,479)	(10,554)	(16,405)	(9,124)
Comprehensive loss	$ (10,470)	$ (14,629)	$ (32,447)	$ (3,474)