Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows provided by (used in) operating activities:
Net income	$ 46,742	$ 45,721
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	51,232	48,931
Rationalization charges	6,083	703
Stock compensation expense	3,909	3,700
Other changes that provided (used) cash:
Trade accounts receivable, net	(88,594)	(49,615)
Inventories	(53,793)	(74,451)
Trade accounts payable	(81,242)	(16,077)
Accrued liabilities	(51,321)	(41,215)
Other, net	11,198	(7,816)
Net cash used in operating activities	(155,786)	(90,119)
Cash flows provided by (used in) investing activities:
Capital expenditures	(61,746)	(49,196)
Other, net	20	800
Net cash used in investing activities	(61,726)	(48,396)
Cash flows provided by (used in) financing activities:
Borrowings under revolving loans	614,103	444,595
Repayments under revolving loans	(205,856)	(79,821)
Repayments of long-term debt	(8,161)	(4,638)
Changes in outstanding checks - principally vendors	(83,670)	(87,795)
Dividends paid on common stock	(14,161)	(11,333)
Repurchase of common stock under stock plan	(15,046)	(2,746)
Net cash provided by financing activities	287,209	258,262
Effect of exchange rate changes on cash and cash equivalents	(1,116)	1,260
Cash and cash equivalents:
Net increase	68,581	121,007
Balance at beginning of year	72,819	53,533
Balance at end of period	141,400	174,540
Interest paid, net	39,969	39,953
Income taxes paid, net	$ 16,933	$ 21,835