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Consolidation and Nature of Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash paid during the period for:
Income taxes, net of (refunds)	$ 425	$ (650)
Interest, net of amounts capitalized	49,038	62,892
Significant non-cash investing and financing activities:
Accrued capital expenditures	$ 6,575	$ 13,622

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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- Definition

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

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