CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities:
Net income	$ 677,900	$ 1,255,805	$ 805,796
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	321,082	317,198	298,999
Equity-based compensation	47,631	43,317	36,197
Deferred income taxes	51,721	61,827	(135,899)
Other adjustments	1,413	(1,245)	14,068
Changes in certain assets and liabilities:
Accounts receivable	237,805	(145,873)	(139,054)
Inventories	217,866	(246,213)	(242,883)
Other assets	13,735	(3,475)	4,002
Accounts payable	(86,445)	37,904	96,062
Income taxes receivable/payable	(12,095)	26,471	(33,889)
Accrued expenses	(74,323)	69,753	36,021
Net cash provided by operating activities	1,396,290	1,415,469	739,420
Investing activities:
Purchases of property, plant and equipment	(451,945)	(239,390)	(164,935)
Purchases of short-term investments	(396,159)	(268,783)
Proceeds from maturities of short-term investments	362,768	40,000
Acquisition of business, net of cash acquired	(97,106)	(433,998)	(6,192)
Other investing activities	5,756	6,907	32,022
Net cash used in investing activities	(576,686)	(895,264)	(139,105)
Financing activities:
Issuance of current and long-term debt	1,573,962	445,607	620,041
Repayment of current and long-term debt	(1,264,152)	(455,491)	(609,914)
Dividends paid	(200,271)	(168,913)	(145,565)
Purchases of treasury stock	(348,608)	(523,569)	(252,242)
Other financing activities	(27,561)	(18,501)	(25,655)
Net cash used in financing activities	(266,630)	(720,867)	(413,335)
Increase (decrease) in cash and equivalents, and restricted cash	552,974	(200,662)	186,980
Cash and equivalents, and restricted cash at beginning of period	834,423	1,035,085	848,105
Cash and equivalents, and restricted cash at end of period	1,387,397	834,423	1,035,085
Supplemental disclosure information:
Cash paid for interest	134,550	124,034	135,381
Cash paid for income taxes, net	$ 155,525	$ 288,429	$ 296,493