Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows provided by (used in) operating activities:
Net income	$ 193,814	$ 223,994	$ 269,659
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	206,483	191,737	174,062
Amortization of debt issuance costs	3,463	3,774	4,259
Rationalization charges	56,351	6,253	5,826
Stock compensation expense	17,078	14,923	14,639
Loss on early extinguishment of debt	1,676	2,493	7,052
Deferred income tax (benefit) provision	(20,859)	23,740	(114,969)
Other changes that provided (used) cash, net of effects from acquisition:
Trade accounts receivable, net	3,800	516	(37,107)
Inventories	53	20,366	(17,228)
Trade accounts payable	16,453	61,095	84,102
Accrued liabilities	13,950	3,564	4,321
Other, net	15,093	(45,935)	(4,851)
Net cash provided by operating activities	507,355	506,520	389,765
Cash flows provided by (used in) investing activities:
Purchase of business, net of cash acquired	0	0	(1,023,848)
Capital expenditures	(230,944)	(190,973)	(174,429)
Other, net	854	1,051	600
Net cash used in investing activities	(230,090)	(189,922)	(1,197,677)
Cash flows provided by (used in) financing activities:
Borrowings under revolving loans	1,194,120	1,043,370	1,172,079
Repayments under revolving loans	(1,292,280)	(991,006)	(1,316,758)
Changes in outstanding checks – principally vendors	(4,664)	(4,125)	8,851
Proceeds from issuance of long-term debt	400,000	0	1,789,200
Repayments of long-term debt	(359,432)	(286,200)	(755,037)
Debt issuance costs	(4,825)	(3,272)	(16,964)
Dividends paid on common stock	(50,840)	(44,549)	(40,493)
Repurchase of common stock	(27,604)	(7,828)	(4,123)
Net cash (used in) provided by financing activities	(145,525)	(293,610)	836,755
Effect of exchange rate changes on cash and cash equivalents	(735)	(3,702)	0
Cash and cash equivalents:
Net increase	131,005	19,286	28,843
Balance at beginning of year	72,819	53,533	24,690
Balance at end of year	203,824	72,819	53,533
Interest paid, net	108,798	118,377	97,595
Income taxes paid, net of refunds	$ 40,650	$ 47,172	$ 70,239