Note 23 - Junior Subordinated Debentures - Consolidated Debt Obligations Related to a Subsidiary Trust Holding (Details) (Parentheticals) - London Interbank Offered Rate (LIBOR) [Member]	12 Months Ended
Dec. 31, 2016
First South Preferred Trust I [Member]
Debt Instrument, Basis Spread on Variable Rate	2.95%
Increase First South Preferred Trust I [Member]
Debt Instrument, Basis Spread on Variable Rate	2.95%

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration