Note 6 - Stockholders' Equity (Details) - Reclassification from Accumulated Other Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loss on cash flow hedges	$ (3,127)	$ (2,909)	$ (9,326)	$ (9,394)
Taxes	(21,458)	(16,822)	(59,372)	(46,494)
Loss on cash flow hedges, net	34,537	31,018	97,580	78,628
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loss on cash flow hedges	(119)	(134)	(370)	(606)
Taxes	46	51	141	232
Loss on cash flow hedges, net	$ (73)	$ (83)	$ (229)	$ (374)