Note 20 - Fair Value Measurement - Assets Measured at Fair Value on a Non-recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Inputs, Level 1 [Member]
Total December 31, 2016		$ 31,385
Fair Value, Inputs, Level 2 [Member]
Total December 31, 2016		236,095
Fair Value, Inputs, Level 3 [Member]
Total December 31, 2016		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Impaired loans, net	$ 0	0
Other real estate owned	0	0
Total December 31, 2016	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Impaired loans, net	0	0
Other real estate owned	0	0
Total December 31, 2016	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans, net	10,730	15,202
Other real estate owned	3,229	6,125
Total December 31, 2016	13,959	21,327
Fair Value, Measurements, Nonrecurring [Member] | Estimate of Fair Value Measurement [Member]
Impaired loans, net	10,730	15,202
Other real estate owned	3,229	6,125
Total December 31, 2016	$ 13,959	$ 21,327