CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands		3 Months Ended
		Apr. 01, 2016	Apr. 03, 2015
Statement Of Income And Comprehensive Income [Abstract]
Consolidated net income		$ 1,906	$ 3,446
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax	[1]	65	(4,506)
Pension liability adjustments, net of tax	[2]	449	729
Total other comprehensive income (loss)		514	(3,777)
Total consolidated comprehensive income (loss)		$ 2,420	$ (331)

[1] The tax effect on this component of comprehensive income was nominal for the three months ended April 1, 2016 and $0.5 million for the three months ended April 3, 2015.

[2] The tax effect on this component of comprehensive income was not material for all periods presented. See Note 4 for the total amount of pension liability adjustments reclassified out of accumulated other comprehensive income (loss).