Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2016	Sep. 26, 2015
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning	$ 172,441
Other comprehensive income before reclassifications	167	$ (5,032)
Amounts reclassified from accumulated other comprehensive income (loss)	503	293
Balance, ending	176,894
Foreign Currency Translation Adjustment
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning	(28,704)	(21,757)
Other comprehensive income before reclassifications	167	(5,032)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Balance, ending	(28,537)	(26,789)
Pension and Other Postretirement Actuarial Items
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning	(4,417)	(4,803)
Other comprehensive income before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	503	293
Balance, ending	(3,914)	(4,510)
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning	(33,121)	(26,560)
Balance, ending	$ (32,451)	$ (31,299)