Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 25, 2016	Jun. 27, 2015	Jun. 25, 2016	Jun. 27, 2015
Net income (loss)	$ 2,607	$ (72)	$ 696	$ (2,812)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(342)	2,810	2,163	(5,533)
Adjustments related to postretirement benefits	(15)	(77)	(33)	(132)
Change in unrealized gain/loss on investments	1		2
Other comprehensive income (loss), net of tax	(356)	2,733	2,132	(5,665)
Comprehensive income (loss)	$ 2,251	$ 2,661	$ 2,828	$ (8,477)