Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 40,211	$ 103,016
Depreciation and amortization	166,468	154,406
Loss on debt retirement, net	10,557	10,562
Other operating activities and non-cash items	3,648	(4,697)
Changes in assets and liabilities	13,013	(72,779)
Net cash provided by operating activities	233,897	190,508
Cash flows from investing activities:
Purchases of property, plant, and equipment	(224,629)	(142,928)
Proceeds from the sale of property, plant and equipment	14,643	1,062
Financing lease payment from unconsolidated affiliate	5,991	7,767
Other investing activities	(4,014)	(9,782)
Net cash used in investing activities	(208,009)	(143,881)
Cash flows from financing activities:
Borrowings under revolving credit facilities		3,261
Payments under revolving credit facilities		(34,253)
Proceeds from issuance of short-term working capital facility	20,000	15,000
Payments of short-term working capital facility	(15,000)	(15,000)
Proceeds from issuance of long-term debt	325,000	611,007
Proceeds from issuance of long-term debt, related party	75,000
Payments of long-term debt, net of certain redemption premiums and discounts	(354,693)	(577,259)
Payments for debt issuance costs	(5,875)	(7,579)
Proceeds from issuance of stock through share-based compensation plans	907	587
Payments of tax withholding for restricted shares	(744)
Net cash provided by (used in) financing activities	44,595	(4,236)
Effect of exchange rate fluctuations on cash and cash equivalents	(10)	6
Net increase in cash and cash equivalents	70,473	42,397
Cash and cash equivalents, beginning of period	404,998	395,406
Cash and cash equivalents, end of period	475,471	437,803
Cash paid during the period for:
Interest	40,309	52,945
Income taxes	12,158	4,118
Non cash investing and financing activities:
Common stock issuance for conversion of related party 6.25% convertible subordinated notes	$ 100,000