CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities:
Net income (loss)	$ (145,170)	$ 91,650	$ 163,516
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	294,595	263,325	230,928
Impairment charges	428,500	260,000	308
Equity-based compensation	22,604	14,016	15,504
Deferred income taxes	(99,323)	(25,042)	30,737
Loss on disposal of assets	9,763	5,561	1,082
Changes in certain assets and liabilities:
Accounts receivable	311,302	(2,191)	(78,237)
Inventories	488,003	68,730	(108,025)
Other assets	3,284	3,064	13,705
Accounts payable	(227,092)	(76,141)	40,141
Income taxes receivable/payable	12,706	(22,086)	(12,494)
Accrued expenses	(60,689)	36,686	15,010
Net cash provided by operating activities	1,038,483	617,572	312,175
Investing activities:
Purchases of property, plant and equipment	(114,501)	(111,785)	(186,843)
Proceeds from maturities of short-term commercial paper, net			31,520
Acquisition of business, net of cash acquired	(45,000)	(1,669,449)
Other investing activities	9,874	33,967	2,478
Net cash used in investing activities	(149,627)	(1,747,267)	(152,845)
Financing activities:
Issuance of current and long-term debt	207,930	1,822,096	423,965
Repayments of current and long-term debt	(612,534)	(635,578)	(517,978)
Proceeds from exercise of stock options, including related tax effect	10,781	32,307	37,508
Contributions from noncontrolling investors		5,418	17,860
Distributions to noncontrolling investors	(1,187)	(743)	(439)
Dividends paid	(127,569)	(105,379)	(94,812)
Debt issuance costs	(608)	(22,219)	(6,195)
Net cash provided by (used in) financing activities	(523,187)	1,095,902	(140,091)
Increase (decrease) in cash and equivalents	365,669	(33,793)	19,239
Cash and equivalents at beginning of year	361,363	395,156	375,917
Cash and equivalents at end of year	$ 727,032	$ 361,363	$ 395,156