Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows provided by (used in) operating activities:
Net income	$ 167,757	$ 135,772
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	122,386	104,197
Rationalization charges	10,711	4,741
Stock compensation expense	10,337	9,056
Loss on early extinguishment of debt	883	1,481
Other changes that provided (used) cash, net of effects from acquisitions:
Trade accounts receivable, net	(277,768)	(179,949)
Inventories	(233,815)	(148,141)
Trade accounts payable	31,825	(68,026)
Accrued liabilities	(24,316)	67,936
Other, net	(17,313)	9,129
Net cash used in operating activities	(209,313)	(63,804)
Cash flows provided by (used in) investing activities:
Purchase of businesses, net of cash acquired	2,305	(941,102)
Capital expenditures	(123,604)	(106,436)
Other, net	4,914	983
Net cash used in investing activities	(116,385)	(1,046,555)
Cash flows provided by (used in) financing activities:
Borrowings under revolving loans	318,141	927,302
Repayments under revolving loans	(105,856)	(570,955)
Proceeds from issuance of long-term debt	499,725	1,639,661
Repayments of long-term debt	(500,000)	(766,170)
Changes in outstanding checks - principally vendors	(84,216)	(79,006)
Dividends paid on common stock	(31,564)	(27,121)
Debt issuance costs	(4,905)	(10,265)
Repurchase of common stock	(8,538)	(13,155)
Net cash provided by financing activities	82,787	1,100,291
Effect of exchange rate changes on cash and cash equivalents	(1,749)	(2,674)
Cash and cash equivalents:
Net decrease	(244,660)	(12,742)
Balance at beginning of year	409,481	203,824
Balance at end of period	164,821	191,082
Interest paid, net	48,026	38,058
Income taxes paid, net	$ 47,297	$ 28,974