Note 13 - Derivatives - Gains (Losses) on Derivatives and Location on Income Statement (Details) - Reclassification out of Accumulated Other Comprehensive Income [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Interest Rate Swap [Member] | Interest on FHLB [Member]
Derivative gains (losses)	$ 396	[1]
Forward Starting Interest Rate Swaps [Member]
Derivative gains (losses)	2,721
Forward Starting Interest Rate Swaps [Member] | Interest on FHLB [Member]
Derivative gains (losses)	$ 2,325	[2]

[1] Losses represent tax effected amounts reclassified from accumulated other comprehensive income pertaining to net settlements recorded during the period on active interest rate swaps.

[2] Gains represent tax effected amounts reclassified from accumulated other comprehensive income pertaining to the terminated forward starting interest rate swap.