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Note 9 - Fair Value of Financial Instruments (Details Textual) - Not Designated as Hedging Instrument [Member] - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Nov. 09, 2016
Interest Rate Caps, LIBOR Strike Price, Percentage       2.00%
Interest Rate Cap [Member]        
Derivative, Notional Amount       $ 410,000
Derivative, Fair Value, Net $ 271   $ 409  
Derivative, Gain (Loss) on Derivative, Net $ 137 $ 9