Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows provided by (used in) operating activities:
Net income	$ 101,067	$ 51,157
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	97,903	83,327
Rationalization charges	1,195	3,923
Stock compensation expense	7,420	7,202
Loss on early extinguishment of debt	2,493	7,052
Other changes that provided (used) cash, net of effects from acquisition:
Trade accounts receivable, net	(134,961)	(118,516)
Inventories	(176,222)	(134,374)
Trade accounts payable	45,232	(27,554)
Accrued liabilities	(29,125)	(2,101)
Other, net	(7,886)	(8,923)
Net cash used in operating activities	(92,884)	(138,807)
Cash flows provided by (used in) investing activities:
Purchase of business, net of cash acquired	0	(1,022,092)
Capital expenditures	(91,278)	(81,287)
Other, net	486	477
Net cash used in investing activities	(90,792)	(1,102,902)
Cash flows provided by (used in) financing activities:
Borrowings under revolving loans	848,686	992,436
Repayments under revolving loans	(132,386)	(559,050)
Proceeds from issuance of long-term debt	0	1,789,200
Repayments of long-term debt	(284,638)	(744,416)
Changes in outstanding checks - principally vendors	(87,795)	(78,941)
Dividends paid on common stock	(22,417)	(20,253)
Debt issuance costs	(2,866)	(16,643)
Repurchase of common stock under stock plan	(3,057)	(3,231)
Net cash provided by financing activities	315,527	1,359,102
Effect of exchange rate changes on cash and cash equivalents	(4,164)	0
Cash and cash equivalents:
Net increase	127,687	117,393
Balance at beginning of year	53,533	24,690
Balance at end of period	181,220	142,083
Interest paid, net	62,192	35,686
Income taxes paid, net	$ 31,303	$ 33,260