Supplemental Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Cash Payments (Refunds)
Interest (exclusive of amount capitalized)	$ 175	$ 4,448
Income taxes	1,816	(35,938)
Noncash Investing and Financing Activities
Accrued liabilities for purchases of property, plant & equipment	3,895	6,378
Amounts referable to business acquisition (Note 13)
Liabilities assumed	0	14,330
Fair value of equity consideration	$ 0	$ 18,898

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

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- Definition

The total amount of [all] liabilities that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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