Note 6 - Credit Facilities and Long-Term Debt (Detail) - Future Principal Payments on Long-term Debt (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
2013	$ 8,182
2014	8,459
2015	8,713
2016	32,885
2017	109,216
Thereafter	127,603
Total principal payments	$ 295,058

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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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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