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Note 3 - Fair Value Measurement (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Long-term Debt	$ 832,936,000	$ 832,867,000
Long-term Debt, Fair Value	$ 860,400,000	$ 844,400,000

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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