Note 14 - Derivatives - Gains (Losses) on Derivatives and Location on Income Statement (Details) - Reclassification out of Accumulated Other Comprehensive Income [Member] - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest Rate Swap [Member] | Interest on FHLB [Member]
Derivative gains (losses)	[1]		$ 292	$ 396	$ 587
Forward Starting Interest Rate Swaps [Member] | Other Noninterest Income [Member]
Derivative gains (losses)	[2]			2,325
Forward Starting Interest Rate Swaps [Member]
Derivative gains (losses)			$ 292	$ 2,721	$ 587

[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] Losses represent tax effected amounts reclassified from accumulated other comprehensive income pertaining to the terminated active and forward starting interest rate swaps.