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Supplemental Information Referable to Consolidated Statements of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Payments
Interest (exclusive of amount capitalized)	$ 1,426	$ 175
Income taxes	584	1,816
Noncash Investing and Financing Activities
Accrued liabilities for purchases of property, plant & equipment	$ 5,404	$ 3,895

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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