Acquisitions and Dispositions - Condensed Pro Forma Consolidated Results of Operations (Details) - ATCO [Member] - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017
Business Acquisition [Line Items]
Net sales	$ 2,036,367	$ 1,868,677
Net income	$ 84,823	$ 82,523
Basic earnings per share (in dollars per share)	$ 1.49	$ 1.45
Diluted earnings per share (in dollars per share)	$ 1.48	$ 1.44