Note 11 - Long-term Debt (Detail) - Credit Facility, Unused Fee Schedule (USD $)	9 Months Ended	3 Months Ended
Sep. 30, 2012	Sep. 30, 2012 Level II [Member] Maximum [Member] Revolver [Member]	Sep. 30, 2012 Minimum [Member] Level I [Member] Revolver [Member]
Average Used Portion of the Revolver plus Outstanding Letters of Credit (in Dollars)		$ 60,000,000	$ 60,000,000
Applicable Unused Revolver Fee Margin	0.50%	0.50%	0.375%

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

No definition available.

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Balance Type:	na
Period Type:	duration