Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net income	$ 70,099	$ 35,030
Depreciation and amortization	302,007	272,891
Loss on debt retirement, net	11,619	0
Other operating activities and non-cash items	(12,728)	(724)
Changes in assets and liabilities	4,248	(22,761)
Net cash provided by operating activities	375,245	284,436
Cash flows from investing activities:
Purchases of property, plant and equipment	(402,004)	(380,344)
Acquisition of business, net of cash acquired	(41,865)	0
Proceeds from the sale of property, plant and equipment	26,505	3,759
Payments from unconsolidated affiliate	8,843	13,684
Investment in unconsolidated affiliate	(67,372)	0
Other investing activities	(1,015)	1,451
Net cash used in investing activities	(476,908)	(361,450)
Cash flows from financing activities:
Borrowings under revolving credit facilities	5,000	0
Payments under revolving credit facilities	(5,000)	0
Borrowings under short-term debt	0	30,000
Payments of short-term debt	0	(40,000)
Proceeds from issuance of long-term debt	293,000	562,528
Payments of long-term debt, net	0	(272,976)
Payments for debt issuance costs	(3,216)	(6,007)
Payments for the retirement of debt	(11,619)	0
Payments for repurchase of common stock	0	(80,946)
Proceeds from the issuance of stock through share-based compensation plans	0	181
Payments of tax withholding for restricted shares	(234)	(546)
Net cash provided by financing activities	277,931	192,234
Effect of exchange rate fluctuations on cash and cash equivalents	1,994	(766)
Net increase in cash and cash equivalents	178,262	114,454
Cash and cash equivalents, beginning of period	413,048	434,631
Cash and cash equivalents, end of period	591,310	549,085
Non cash investing and financing activities:
Common stock issuance for exchange of 6.0% convertible senior subordinated notes due April 2014, $150 million related party	$ 193,650	$ 0