Unaudited Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income	$ 179,453	$ 246,948
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	135,537	104,884
Deferred income tax provision	(538)	4,991
Excess tax benefits from share-based payment arrangements	(5,329)	(6,014)
Gains on disposals of assets	(333)	(4,851)
Non-cash compensation charge	13,133	9,189
Accretion of debt discount		4,106
Amortization of deferred financing costs	4,041	3,600
Other, net	1,201	(547)
Changes in operating assets and liabilities, net of effect from acquired businesses:
Accounts receivable	73,965	(99,243)
Inventories	(2,059)	(79,781)
Accounts payable and accrued liabilities	(29,774)	35,920
Taxes payable	2,618	29,137
Other current assets and liabilities, net	(12,933)	2,707
Net cash flows provided by operating activities	358,982	251,046
Cash flows from investing activities:
Capital expenditures, including capitalized interest	(240,423)	(199,983)
Acquisitions of businesses, net of cash acquired	(321)
Proceeds from disposition of property, plant and equipment	2,633	5,225
Other, net	94	(1,650)
Net cash flows used in investing activities	(238,017)	(196,408)
Cash flows from financing activities:
Revolving credit borrowings and (repayments), net	(47,901)	(951)
Term loan repayments	(92,762)	(14,944)
Debt and capital lease repayments	(209)	(2,312)
Issuance of common stock from share-based payment arrangements	10,388	7,801
Purchase of treasury stock	(1,485)
Excess tax benefits from share-based payment arrangements	5,329	6,014
Shares added to treasury stock as a result of net share settlements due to vesting of restricted stock	(3,722)	(4,092)
Other, net	(201)	(23)
Net cash flows provided by (used in) financing activities	(130,563)	(8,507)
Effect of exchange rate changes on cash	(17,717)	(3,461)
Net change in cash and cash equivalents from continuing operations	(27,315)	42,670
Cash and cash equivalents, beginning of period	253,172	71,721
Cash and cash equivalents, end of period	$ 225,857	$ 114,391