Supplemental Cash Flow Information (Details) (USD $) In Thousands	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010
Cash Payments (Refunds)
Interest (exclusive of amount capitalized)	$ 102,260	$ 101,917
Income taxes	(31,127)	3,897
Noncash Investing and Financing Activities
Accrued liabilities for purchases of property, plant & equipment	6,511	4,674
Stock issued for pension contribution (Note 9)	0	53,864
Amounts referable to business acquisition (Note 14)
Liabilities assumed	13,774	150
Fair value of equity consideration	$ 18,529	$ 0

Future cash outflow to pay for purchases of fixed assets that have occurred.

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