Condensed Consolidated Statements Of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Condensed Consolidated Statements Of Income (Loss) [Abstract]
Net sales	$ 514,964	$ 602,820
Cost of sales	471,603	552,783
Gross profit	43,361	50,037
Selling, general and administrative expenses	31,575	30,007
Amortization of intangible assets	2,381	2,367
Restructuring charges and other costs	2,915	1,576
Income from operations	6,490	16,087
Interest expense	(1,702)	(1,609)
Interest income	599	1,297
Other income (expense), net	(662)	1,604
Income before income taxes	4,725	17,379
Income tax expense	873	3,606
Net income	$ 3,852	$ 13,773
Earnings per share:
Basic	$ 0.10	$ 0.34
Diluted	$ 0.10	$ 0.34
Weighted-average number of shares outstanding:
Basic	36,790	40,630
Diluted	37,071	40,853