Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows provided by (used in) operating activities:
Net income	$ 26,572	$ 33,304
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	36,218	36,676
Rationalization charges	1,071	725
Stock compensation expense	3,059	3,261
Other changes that provided (used) cash:
Trade accounts receivable, net	(54,914)	(84,675)
Inventories	(120,811)	(144,952)
Trade accounts payable	(50,302)	(3,522)
Accrued liabilities	4,393	6,542
Other, net	3,891	8,927
Net cash used in operating activities	(150,823)	(143,714)
Cash flows provided by (used in) investing activities:
Capital expenditures	(61,974)	(48,806)
Proceeds from asset sales	1,106	24
Net cash used in investing activities	(60,868)	(48,782)
Cash flows provided by (used in) financing activities:
Borrowings under revolving loans	337,178	405,644
Repayments under revolving loans	(38,006)	(45,158)
Proceeds from issuance of long-term debt	0	935
Repayments of long-term debt	(6,387)	(4,173)
Changes in outstanding checks - principally vendors	(101,765)	(82,805)
Dividends paid on common stock	(10,456)	(10,292)
Repurchase of common stock under stock plan	(2,204)	(2,538)
Repurchase of common stock under share repurchase authorization	0	(162,630)
Net cash provided by financing activities	178,360	98,983
Cash and cash equivalents:
Net decrease	(33,331)	(93,513)
Balance at beginning of year	99,945	222,591
Balance at end of period	66,614	129,078
Interest paid, net	13,275	13,409
Income taxes paid, net	$ 21,594	$ 2,419