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Note 5 - Long-Term Debt and Credit Facility (Detail) - Future Principal Payments of Long-Term Debt (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
2013	$ 33,775
2014	42,723
2015	40,625
2016	138,500
Total	$ 255,623	$ 249,409

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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