Note 9 - Fair Value of Financial Instruments (Details) - Location of Gain or Loss on Interest Rate Derivatives Designated as Cash Flow Hedges - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Location of Gain or Loss on Interest Rate Derivatives Designated as Cash Flow Hedges [Abstract]
Amount of loss recognized in OCI on derivative		$ (1,543)		$ (2,926)
Amount of loss reclassified from accumulated OCI into interest	$ 535	$ 888	$ 1,069	$ 1,771