Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net income	$ 93,095	$ 232,147	$ 156,283
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	335,644	323,608	305,510
Amortization of deferred debt issuance costs and discounts	3,737	4,458	4,780
Provision for accounts receivable	(69)	508	(80)
Deferred income taxes	(2,239)	4,736	(30,599)
Equity in earnings of unconsolidated affiliate	(7,085)	(6,435)	(2,373)
Loss (gain) on debt retirement, net	10,557	10,562	(15,088)
Loss on disposal of fixed assets, net	1,942	423	7,262
Share-based compensation	5,010	3,515	2,577
Other, net	(120)	4,317	838
Changes in assets and liabilities:
Accounts receivable	95,882	(58,225)	(68,912)
Other receivables	2,813	203	(4,338)
Inventories	(6,912)	(34,882)	(20,991)
Other current assets	(5,597)	6,876	5,173
Other assets	347	(1,365)	(1,214)
Trade accounts payable	(7,539)	18,379	96,854
Accrued expenses	(21,676)	18,019	(108,712)
Other non-current liabilities	19,042	15,751	(65,245)
Net cash provided by operating activities	516,832	542,595	261,725
Cash flows from investing activities:
Purchases of property, plant, and equipment	(466,694)	(445,669)	(173,496)
Proceeds from the sale of property, plant and equipment	15,823	3,125	3,116
Investment in unconsolidated affiliate	0	0	(16,735)
Purchase of equipment leased to unconsolidated affiliate	0	0	(44,681)
Financing lease payment from unconsolidated affiliate	10,794	13,384	0
Change in restricted cash	13,046	(10,253)	(2,898)
Other investing activities	(3,503)	(5,508)	(6,184)
Net cash used in investing activities	(430,534)	(444,921)	(240,878)
Cash flows from financing activities:
Borrowings under revolving credit facilities	6,567	3,261	41,410
Payments under revolving credit facilities	(6,567)	(34,253)	(10,171)
Borrowings under credit facilities	20,000	15,000	15,000
Payments under credit facilities	(15,000)	(15,000)	0
Proceeds from issuance of long-term debt	387,512	611,007	100,000
Proceeds from issuance of long-term debt, related party	75,000	0	150,000
Payments of long-term debt, net of redemption premiums and discounts	(392,191)	(663,433)	(338,104)
Payments for debt issuance costs	(5,875)	(7,487)	(8,479)
Payments for repurchase of common stock	(128,368)	0	0
Proceeds from issuance of stock through share-based compensation plans	821	1,048	693
Payments of tax withholding for restricted shares	(776)	0	0
Net cash used in financing activities	(58,877)	(89,857)	(49,651)
Effect of exchange rate fluctuations on cash and cash equivalents	2,212	1,775	(106)
Net increase (decrease) in cash and cash equivalents	29,633	9,592	(28,910)
Cash and cash equivalents, beginning of period	404,998	395,406	424,316
Cash and cash equivalents, end of period	434,631	404,998	395,406
Cash paid during the period for:
Interest	81,280	96,642	116,223
Income taxes	16,380	5,906	11,991
Non cash investing and financing activities:
Receivable for equipment leased to unconsolidated affiliate	0	0	44,681
Common stock issuance for conversion of related party 6.25% convertible subordinated notes due December 2013	$ 100,000	$ 0	$ 0