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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net sales	$ 387,074	$ 533,174
Cost of sales	350,331	464,484
Gross profit	36,743	68,690
General and administrative expenses	26,192	30,140
Selling expenses	7,998	8,223
Amortization of intangible assets	5,495	5,129
Impairment	107,114	0
(Loss) income from operations	(110,056)	25,198
Other income (expense):
Interest expense	(6,272)	(7,090)
Other, net	120	(169)
Other expense, net	(6,152)	(7,259)
(Loss) income before income tax (benefit) expense	(116,208)	17,939
Income tax (benefit) expense	(9,561)	3,159
Net (loss) income	$ (106,647)	$ 14,780
Net (loss) income per share:
Basic (in usd per share)	$ (2.01)	$ 0.27
Diluted (in usd per share)	$ (2.01)	$ 0.27
Weighted average common shares outstanding (in thousands):
Basic (in shares)	53,156	55,268
Diluted (in shares)	53,156	55,770
Dividends declared per share (in usd per share)	$ 0.08	$ 0.08

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