Note 2 - Derivative Instruments and Hedging Activities (Details) - Derivative Impact on Condensed Consolidated Statements of Income (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Interest Expense [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Note 2 - Derivative Instruments and Hedging Activities (Details) - Derivative Impact on Condensed Consolidated Statements of Income [Line Items]
Amount of loss recognized in Accumulated Other Comprehensive Loss	$ (1,208)				$ (1,708)
Interest Expense [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Note 2 - Derivative Instruments and Hedging Activities (Details) - Derivative Impact on Condensed Consolidated Statements of Income [Line Items]
Amount of loss recognized in Accumulated Other Comprehensive Loss	0	[1]	0	[1]	0	[1]	0	[1]
Amount of loss reclassified from Accumulated Other Comprehensive Loss into Net Income	0	[1]	(1,003)	[1]	0	[1]	(2,005)	[1]
Amount of gain (loss) recognized in Net Income on hedges (ineffective portion)	0	[1]	1,266	[1]	0	[1]	2,472	[1]
Cost of Sales [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Note 2 - Derivative Instruments and Hedging Activities (Details) - Derivative Impact on Condensed Consolidated Statements of Income [Line Items]
Amount of loss recognized in Accumulated Other Comprehensive Loss	0		0		0		0
Amount of loss reclassified from Accumulated Other Comprehensive Loss into Net Income	0		0		0		0
Amount of gain (loss) recognized in Net Income on hedges (ineffective portion)	$ 224		$ (826)		$ (144)		$ (1,118)

[1] Amounts recorded for the three and six months ended June 30, 2013 relate to interest rate swap agreements outstanding as of May 30, 2012, the date the hedging relationships for these agreements were terminated.