Note 5 - Loans (Details) - Troubled Debt Restructurings Removed from Classification (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014
Troubled Debt Restructurings Removed from Classification [Abstract]
Carrying balance	$ 956
Count	3

The amount of the outstanding recorded investment related to financing receivables that have been removed from troubled debt restructuring classification.

No definition available.

Name:	plmt_FinancingReceivableReclassifiedFromTroubledDebtRestructuring
Namespace Prefix:	plmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration