Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Consolidated Statements Of Income [Abstract]
Sales	$ 2,310,415	$ 2,540,873	$ 2,797,061
Cost of sales	2,096,952	2,321,619	2,576,745
Gross profit	213,463	219,254	220,316
Selling, general and administrative expenses	113,448	107,462	112,378
Amortization of intangible assets	11,838	4,962	3,781
Restructuring charges and other costs	12,539	13,861	7,131
Thailand flood-related items, net of insurance	0	0	(1,571)
Asset impairment charge and other	0	0	(1,547)
Income from operations	75,638	92,969	100,144
Interest expense	(9,304)	(2,996)	(1,890)
Interest income	2,136	1,207	2,048
Other expense	(282)	(1,141)	(1,673)
Income before income taxes	68,188	90,039	98,629
Income tax expense (benefit)	4,141	(5,362)	17,388
Net income	$ 64,047	$ 95,401	$ 81,241
Earnings per share:
Basic	$ 1.3	$ 1.85	$ 1.52
Diluted	$ 1.29	$ 1.83	$ 1.5
Weighted-average number of shares outstanding:
Basic	49,298	51,573	53,538
Diluted	49,825	52,088	54,222