Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows provided by (used in) operating activities:
Net income	$ 23,232	$ 26,572
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	37,572	36,218
Rationalization charges	885	1,071
Stock compensation expense	3,279	3,059
Loss on early extinguishment of debt	2,677	0
Other changes that provided (used) cash:
Trade accounts receivable, net	(41,452)	(54,914)
Inventories	(107,446)	(120,811)
Trade accounts payable	(36,806)	(50,302)
Accrued liabilities	(17,583)	4,393
Other, net	(5,287)	3,891
Net cash used in operating activities	(140,929)	(150,823)
Cash flows provided by (used in) investing activities:
Capital expenditures	(38,893)	(61,974)
Proceeds from asset sales	386	1,106
Net cash used in investing activities	(38,507)	(60,868)
Cash flows provided by (used in) financing activities:
Borrowings under revolving loans	655,633	337,178
Repayments under revolving loans	(508,865)	(38,006)
Proceeds from issuance of long-term debt	989,200	0
Repayments of long-term debt	(521,666)	(6,387)
Changes in outstanding checks - principally vendors	(78,946)	(101,765)
Dividends paid on common stock	(10,115)	(10,456)
Debt issuance costs	(16,643)	0
Repurchase of common stock under stock plan	(3,231)	(2,204)
Net cash provided by financing activities	505,367	178,360
Cash and cash equivalents:
Net increase (decrease)	325,931	(33,331)
Balance at beginning of year	24,690	99,945
Balance at end of period	350,621	66,614
Interest paid, net	12,234	13,275
Income taxes paid, net	$ 8,065	$ 21,594