Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows provided by (used in) operating activities:
Net income	$ 248,623	$ 158,970
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	163,454	156,780
Rationalization charges	7,247	48,594
Stock compensation expense	13,880	12,669
Loss on early extinguishment of debt	1,481	1,676
Other changes that provided (used) cash, net of effects from acquisitions:
Trade accounts receivable, net	(311,008)	(250,783)
Inventories	2,435	(75,414)
Trade accounts payable	(73,814)	(63,609)
Accrued liabilities	57,187	(10,475)
Other, net	8,981	19,181
Net cash provided by (used in) operating activities	118,466	(2,411)
Cash flows provided by (used in) investing activities:
Purchase of businesses, purchase price	(940,875)	0
Capital expenditures	(165,163)	(166,848)
Other, net	999	509
Net cash used in investing activities	(1,105,039)	(166,339)
Cash flows provided by (used in) financing activities:
Borrowings under revolving loans	993,406	1,139,329
Repayments under revolving loans	(748,539)	(464,759)
Proceeds from issuance of long-term debt	1,639,661	0
Repayments of long-term debt	(766,170)	(308,161)
Changes in outstanding checks - principally vendors	(79,006)	(83,670)
Dividends paid on common stock	(40,432)	(38,615)
Debt issuance costs	(10,265)	0
Repurchase of common stock	(13,155)	(27,364)
Net cash provided by financing activities	975,500	216,760
Effect of exchange rate changes on cash and cash equivalents	1,008	(3,440)
Cash and cash equivalents:
Net (decrease) increase	(10,065)	44,570
Balance at beginning of year	203,824	72,819
Balance at end of period	193,759	117,389
Interest paid, net	70,948	97,630
Income taxes paid, net	$ 91,378	$ 31,067