Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Change in Net Carrying Amount of Goodwill by Segment

The change in the net carrying amount of goodwill for the three months ended March 30, 2019 by segment was as follows (in thousands):

	Steel Mills		Steel Products			Raw Materials		Total
Balance at December 31, 2018	$	591,986	$	862,773		$	729,577	$	2,184,336
Translation		—		(659	)		—		(659	)
Balance at March 30, 2019	$	591,986	$	862,114		$	729,577	$	2,183,677

Schedule of Intangible Assets

	March 30, 2019				December 31, 2018
	Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Customer relationships	$	1,420,668	$	731,454	$	1,418,250	$	713,656
Trademarks and trade names		177,525		90,234		176,046		87,680
Other		63,807		33,424		67,820		32,276
	$	1,662,000	$	855,112	$	1,662,116	$	833,612