Note 11 - Derivative Instruments (Detail) - Effects of Derivative Instruments on the Consolidated Statements of Operations (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Amount of Loss Recognized in Accumulated OCI (Effective Portion)	$ 476	$ (1,544)	$ 998	$ (1,664)
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)	(309)	(535)	(1,067)	(1,446)
Amount of Loss Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	$ (788)	$ 271	$ (2,172)	$ (1,002)