Consolidated Statements of Comprehensive Income (Loss) Parenthetical - Continuing Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 28, 2014
Taxes on change in unrecognized benefit plan gains and losses arising during the period	$ (4,717)	$ (5,176)	$ (121,030)
Taxes on adjustment for previously unrecognized benefit plan gains and losses included in net income	(114)	(25)	(71)
Taxes on changes in unrealized holding gain arising during the period	604	(2,133)	3,512
Taxes on change in foreign currency translation adjustments	$ (1,545)	$ (1,458)	$ (1,525)