CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating activities:
Net income	$ 33,698	$ 41,252
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	57,568	57,061
Equity-based compensation	5,768	4,753
Deferred income taxes	(4,091)	10,935
(Gain) loss on disposal of property, plant and equipment	2,641	(1,383)
Changes in certain assets and liabilities:
Accounts receivable	(88,950)	(110,938)
Inventories	(17,354)	32,348
Other assets	7,359	3,358
Accounts payable	5,041	38,988
Income taxes receivable/payable	19,393	(3,022)
Accrued expenses and liabilities	(48,320)	(43,642)
Net cash provided by (used in) operating activities	(27,247)	29,710
Investing activities:
Purchases of property, plant and equipment	(24,841)	(45,346)
Other investing activities	28,884	33,934
Net cash provided by (used in) investing activities	4,043	(11,412)
Financing activities:
Issuance of current and long-term debt	43,453	409,261
Repayment of current and long-term debt	(56,246)	(305,691)
Debt issuance costs		(5,997)
Proceeds from exercise of stock options, including related tax effect	2,905	7,614
Contributions from noncontrolling investors, net	5,370	411
Dividends paid	(24,515)	(21,952)
Net cash provided by (used in) financing activities	(29,033)	83,646
Increase (decrease) in cash and equivalents	(52,237)	101,944
Cash and equivalents at beginning of period	395,156	375,917
Cash and equivalents at end of period	342,919	477,861
Supplemental disclosure information:
Cash paid for interest	39,663	49,732
Cash paid for federal and state income taxes, net	$ 2,143	$ 11,165