Note 1 - Basis of Presentation (Details) - Property and equipment (USD $) In Thousands, unless otherwise specified							6 Months Ended				6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Land [Member]	Dec. 31, 2012 Land [Member]	Jun. 30, 2013 Building and Building Improvements [Member]	Dec. 31, 2012 Building and Building Improvements [Member]	Jun. 30, 2013 Building and Building Improvements [Member] Minimum [Member]	Jun. 30, 2013 Building and Building Improvements [Member] Maximum [Member]	Jun. 30, 2013 Equipment [Member]	Dec. 31, 2012 Equipment [Member]	Jun. 30, 2013 Equipment [Member] Minimum [Member]	Jun. 30, 2013 Equipment [Member] Maximum [Member]
Property and equipment:
Gross value	$ 404,892	$ 393,853	$ 24,583	$ 24,383	$ 56,213	$ 55,709			$ 324,096	$ 313,761
Estimated useful lives							7	40			3	20
Accumulated depreciation	(269,674)	(258,715)
Total property and equipment, net	$ 135,218	$ 135,138