CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating activities:
Net income	$ 198,666	$ 61,318
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	75,057	73,985
Equity-based compensation	11,303	10,534
Deferred income taxes	7,716	17,087
Other adjustments	(104)	180
Changes in certain assets and liabilities:
Accounts receivable	(153,364)	(75,596)
Inventories	(86,819)	82,567
Other assets	2,113	548
Accounts payable	133,809	112,659
Income taxes receivable/payable	96,319	13,993
Accrued expenses	(44,247)	(6,247)
Net cash provided by operating activities	240,449	291,028
Investing activities:
Purchases of property, plant and equipment	(41,677)	(27,708)
Other investing activities	26,918	3,054
Net cash used in investing activities	(14,759)	(24,654)
Financing activities:
Issuance of current and long-term debt		20,452
Repayment of current and long-term debt	(1,429)	(4,232)
Dividends paid	(34,130)	(33,425)
Purchases of treasury stock	(61,256)
Other financing activities	(3,532)	750
Net cash used in financing activities	(100,347)	(16,455)
Increase in cash and equivalents	125,343	249,919
Cash and equivalents at beginning of period	841,483	727,032
Cash and equivalents at end of period	966,826	976,951
Supplemental disclosure information:
Cash paid for interest	12,649	26,286
Cash paid for income taxes, net	$ 1,554	$ 699