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Supplemental Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash paid for:
Interest	$ 21,257	$ 19,809	$ 28,383
Income/withholding taxes	64,622	6,481	5,009
Non-cash investing activities:
Accrued capital costs	1,041	172	10,579
Non-Cash Activities [Abstract]
Incurred expense for contingent obligation		13,091
Non-cash change in inventory			18,023
Performance shares Liability	$ 0	$ 1,050	$ 694

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

The fair value of liabilities assumed in noncash investing or financing activities.