Note 6 - Interest Rate Swap Derivatives (Details) - Pre-tax Net Gains (Losses) of the Company’s Cash Flow Hedges - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Ineffective portion recognized in income on derivatives	$ 0
Interest Rate Swap 1 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pre-tax gain {loss} recognized in OCI		$ (996,000)
Effective portion amount of gain (loss)
Ineffective portion recognized in income on derivatives
Interest Rate Swap 2 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pre-tax gain {loss} recognized in OCI		$ (1,435,000)
Interest Rate Swap 3 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pre-tax gain {loss} recognized in OCI		$ (1,014,000)