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Note 9 - Foreclosed Real Estate and Repossessed Personal Property (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Dec. 31, 2013
Note 9 - Foreclosed Real Estate and Repossessed Personal Property (Details) [Line Items]        
Real Estate Acquired Through Foreclosure (in Dollars) $ 5,756us-gaap_RealEstateAcquiredThroughForeclosure $ 5,949us-gaap_RealEstateAcquiredThroughForeclosure $ 7,490us-gaap_RealEstateAcquiredThroughForeclosure $ 7,502us-gaap_RealEstateAcquiredThroughForeclosure
Residential Lots [Member]        
Note 9 - Foreclosed Real Estate and Repossessed Personal Property (Details) [Line Items]        
Number of Units in Real Estate Property 55us-gaap_NumberOfUnitsInRealEstateProperty
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= plmt_ResidentialLotsMember		      
Real Estate Acquired Through Foreclosure (in Dollars) $ 4,400us-gaap_RealEstateAcquiredThroughForeclosure
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= plmt_ResidentialLotsMember		      
Number of Real Estate Properties 1us-gaap_NumberOfRealEstateProperties
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= plmt_ResidentialLotsMember