CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands		3 Months Ended
		Apr. 02, 2021	Apr. 03, 2020
Statement Of Income And Comprehensive Income [Abstract]
Consolidated net income		$ 11,310	$ 11,947
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax	[1]	(489)	(6,806)
Pension liability adjustments, net of tax	[2]	121	737
Total other comprehensive income (loss)		(368)	(6,069)
Total consolidated comprehensive income (loss)		$ 10,942	$ 5,878

[1] The tax effect on this component of comprehensive income (loss) was nominal for all periods presented.

[2] The tax effect on this component of comprehensive income (loss) was nominal for all periods presented. See Note 3 for the total amount of pension liability adjustments reclassified out of accumulated other comprehensive income (loss).