CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating activities:
Net income	$ 151,012	$ 154,413	$ 502,625	$ 356,174
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	75,210	74,190	224,068	222,970
Equity-based compensation	6,875	5,946	24,558	23,716
Deferred income taxes	3,284	18,478	17,849	53,879
Other adjustments	8,202	161	8,055	1,376
Changes in certain assets and liabilities:
Accounts receivable	(36,123)	29,384	(193,233)	(149,810)
Inventories	(67,285)	(76,013)	(211,726)	(102,339)
Other assets	(9,234)	694	(1,703)	11,855
Accounts payable	44,887	(49,171)	133,251	117,220
Income taxes receivable/payable	(12,929)	(7,421)	5,803	40,960
Accrued expenses	62,249	45,701	38,058	69,361
Net cash provided by operating activities	226,148	196,362	547,605	645,362
Investing activities:
Purchases of property, plant and equipment	(42,795)	(59,774)	(127,746)	(123,168)
Acquisition of business, net of cash acquired	(5,518)	(109,065)	(5,518)	(109,065)
Other investing activities	1,081	1,507	30,386	5,767
Net cash used in investing activities	(47,232)	(167,332)	(102,878)	(226,466)
Financing activities:
Issuance of current and long-term debt	450,215	12,911	501,448	97,018
Repayment of current and long-term debt	(294,913)	(9,999)	(331,339)	(95,253)
Dividends paid	(37,180)	(34,124)	(108,837)	(101,639)
Purchases of treasury stock	(99,085)		(237,154)
Other financing activities	(4,832)	1,005	(8,364)	5,435
Net cash provided by (used in) financing activities	14,205	(30,207)	(184,246)	(94,439)
Increase (decrease) in cash and equivalents	193,121	(1,177)	260,481	324,457
Cash and equivalents at beginning of period	908,843	1,052,666	841,483	727,032
Cash and equivalents at end of period	1,101,964	1,051,489	1,101,964	1,051,489
Supplemental disclosure information:
Cash paid for interest	13,530	26,225	80,155	97,605
Cash paid for income taxes, net	$ 93,123	$ 75,860	$ 246,793	$ 104,124