Segment and Geographic Information - Summarized Financial Information by Business Segment (Details) $ in Thousands	3 Months Ended
	Mar. 29, 2019 USD ($) segment	Mar. 30, 2018 USD ($)
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Number of operating segments | segment	2
Net sales	$ 457,388	$ 463,327
Net gain on sale of assets	61	63
Operating income	23,364	20,724
Interest expense, net	5,313	5,352
Non-service pension and post retirement benefit cost (income)	(99)	(3,029)
Other income, net	(91)	(342)
Earnings before income taxes	18,241	18,743
Income tax expense	4,116	4,677
Net earnings	14,125	14,066
Distribution
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	290,954	283,932
Aerospace
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	166,434	179,395
Operating segments | Distribution
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	290,954	283,932
Operating income	12,697	11,834
Operating segments | Aerospace
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	166,434	179,395
Operating income	26,612	22,662
Reconciling item
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net gain on sale of assets	61	63
Corporate
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ (16,006)	$ (13,835)