Note 20 - Fair Value Measurements (Details) - Assets Measured at Fair Value on a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Assets
Total assets measured at fair value on a nonrecurring basis	$ 217,109	$ 219,705
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets
Foreclosed real estate and repossessed personal property	82	34
Total assets measured at fair value on a nonrecurring basis	82	34
Fair Value, Inputs, Level 1 [Member]
Assets
Total assets measured at fair value on a nonrecurring basis	21,644	22,992
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets
Mortgage loans held for sale	1,125	1,722
Impaired loans in gross loans	5,709	5,588
Foreclosed real estate and repossessed personal property		31
Total assets measured at fair value on a nonrecurring basis	6,834	7,341
Fair Value, Inputs, Level 2 [Member]
Assets
Total assets measured at fair value on a nonrecurring basis	195,465	196,713
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets
Impaired loans in gross loans		25
Foreclosed real estate and repossessed personal property	4,717	6,595
Total assets measured at fair value on a nonrecurring basis	4,717	6,620
Fair Value, Measurements, Nonrecurring [Member]
Assets
Mortgage loans held for sale	1,125	1,722
Impaired loans in gross loans	5,709	5,613
Foreclosed real estate and repossessed personal property	4,799	6,660
Total assets measured at fair value on a nonrecurring basis	$ 11,633	$ 13,995