Note 11 - Derivative Financial Instruments - Derivative Financial Instruments (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Interest rate swaps, notional amount		$ 285,384	$ 253,414
Interest rate swaps, net carrying value	[1]	3,793	2,964
Designated as Hedging Instrument [Member]
Interest rate swaps, notional amount		249,100	217,100
Not Designated as Hedging Instrument [Member]
Interest rate swaps, notional amount			36,300
Interest Rate Swap [Member]
Interest rate swaps, notional amount		267,400	235,400
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Interest rate swaps, notional amount		221,591	182,177
Interest rate swaps, net carrying value	[1]	6,833	6,350
Interest Rate Swaps 1 [Member] | Designated as Hedging Instrument [Member]
Interest rate swaps, notional amount		27,472	34,916
Interest rate swaps, net carrying value	[1]	(544)	(658)
Interest Rate Swaps 2 [Member] | Not Designated as Hedging Instrument [Member]
Interest rate swaps, notional amount		36,321	36,321
Interest rate swaps, net carrying value	[1]	$ (2,496)	$ (2,728)

[1] Derivatives in a net positive position are recorded as "Other assets" and derivatives in a net negative position are recorded as "Other liabilities" in the Consolidated Statements of Financial Condition. There were no unrealized losses at March 31, 2017 and December 31, 2016.