Note 5 - Loans (Details) - Troubled Debt Restructurings Removed from Classification (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Troubled Debt Restructurings Removed from Classification [Abstract]
Carrying balance	$ 6,543	$ 0	$ 7,499	$ 5,842
Count	1	0	4	8

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

No definition available.

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