Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows provided by (used in) operating activities:
Net income	$ 73,281	$ 57,600
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	60,872	51,090
Rationalization charges	10,357	2,799
Stock compensation expense	5,010	4,483
Loss on early extinguishment of debt	883	1,481
Other changes that provided (used) cash, net of effects from acquisition:
Trade accounts receivable, net	(103,549)	(103,975)
Inventories	(118,132)	(68,965)
Trade accounts payable	(59,825)	(126,728)
Accrued liabilities	(32,062)	20,443
Other, net	(8,983)	(6,364)
Net cash used in operating activities	(172,148)	(168,136)
Cash flows provided by (used in) investing activities:
Purchase of business, net of cash acquired	0	(39,828)
Capital expenditures	(68,764)	(65,147)
Other, net	402	534
Net cash used in investing activities	(68,362)	(104,441)
Cash flows provided by (used in) financing activities:
Borrowings under revolving loans	170,457	877,114
Repayments under revolving loans	(31,310)	(48,970)
Proceeds from issuance of long-term debt	499,725	739,661
Repayments of long-term debt	(500,000)	(766,170)
Changes in outstanding checks - principally vendors	(84,216)	(79,006)
Dividends paid on common stock	(16,055)	(13,771)
Debt issuance costs	(4,633)	(7,544)
Repurchase of common stock	(8,275)	(12,664)
Net cash provided by financing activities	25,693	688,650
Effect of exchange rate changes on cash and cash equivalents	(4,533)	(5,051)
Cash and cash equivalents:
Net (decrease) increase	(219,350)	411,022
Balance at beginning of year	409,481	203,824
Balance at end of period	190,131	614,846
Interest paid, net	31,655	23,518
Income taxes paid, net	$ 15,297	$ 22,056