Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

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 years ended December 31, 2015 and 2014 by segment is as follows (in thousands):

	Steel Mills			Steel Products			Raw Materials		Total
Balance, December 31, 2013	$	495,897		$	774,486		$	703,225	$	1,973,608
Acquisitions		98,505			—			—		98,505
Translation		—			(30,112	)		—		(30,112	)
Other		—			311			26,352		26,663
Balance, December 31, 2014		594,402			744,685			729,577		2,068,664
Translation		—			(53,618	)		—		(53,618	)
Other		(3,768	)		—			—		(3,768	)
Balance, December 31, 2015	$	590,634		$	691,067		$	729,577	$	2,011,278

Schedule of Intangible Assets

Intangible assets with estimated useful lives of 5 to 22 years are amortized on a straight-line or accelerated basis and are comprised of the following (in thousands):

	December 31, 2015				December 31, 2014
	Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Customer relationships	$	1,185,299	$	517,817	$	1,199,942	$	454,353
Trademarks and trade names		155,864		57,756		158,584		48,356
Other		23,025		17,943		22,823		16,547
	$	1,364,188	$	593,516	$	1,381,349	$	519,256