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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows provided by (used in) operating activities:
Net income	$ 308,722	$ 193,814	$ 223,994
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	219,098	206,483	191,737
Amortization of debt discount and debt issuance costs	4,543	3,463	3,774
Rationalization charges	16,031	56,351	6,253
Stock compensation expense	18,780	17,078	14,923
Loss on early extinguishment of debt	1,481	1,676	2,493
Deferred income tax provision (benefit)	24,119	(20,859)	23,740
Other changes that provided (used) cash, net of effects from acquisitions:
Trade accounts receivable, net	(49,415)	3,800	516
Inventories	11,363	53	20,366
Trade accounts payable	21,303	16,453	61,095
Accrued liabilities	38,361	13,950	3,564
Other, net	(11,879)	15,093	(45,935)
Net cash provided by operating activities	602,507	507,355	506,520
Cash flows provided by (used in) investing activities:
Purchase of businesses, net of cash acquired	(940,875)	0	0
Capital expenditures	(224,177)	(230,944)	(190,973)
Other, net	1,868	854	1,051
Net cash used in investing activities	(1,163,184)	(230,090)	(189,922)
Cash flows provided by (used in) financing activities:
Borrowings under revolving loans	1,041,709	1,194,120	1,043,370
Repayments under revolving loans	(1,054,520)	(1,292,280)	(991,006)
Changes in outstanding checks – principally vendors	5,199	(4,664)	(4,125)
Proceeds from issuance of long-term debt	1,639,661	400,000	0
Repayments of long-term debt	(766,170)	(359,432)	(286,200)
Debt issuance costs	(10,265)	(4,825)	(3,272)
Dividends paid on common stock	(53,643)	(50,840)	(44,549)
Repurchase of common stock	(42,111)	(27,604)	(7,828)
Net cash provided by (used in) financing activities	759,860	(145,525)	(293,610)
Effect of exchange rate changes on cash and cash equivalents	6,474	(735)	(3,702)
Cash and cash equivalents:
Net increase	205,657	131,005	19,286
Balance at beginning of year	203,824	72,819	53,533
Balance at end of year	409,481	203,824	72,819
Interest paid, net	89,535	108,798	118,377
Income taxes paid, net of refunds	$ 120,959	$ 40,650	$ 47,172

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