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		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Location of Gain or Loss on Interest Rate Derivatives Designated as Cash Flow Hedges [Abstract]
Amount of gain (loss) recognized in OCI on derivative		$ 135		$ (2,792)
Amount of loss reclassified from accumulated OCI into interest	$ 535	$ 869	$ 1,604	$ 2,641