Note 13 - Borrowings (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Note 13 - Borrowings (Details) [Line Items]
Securities Sold under Agreements to Repurchase, Fair Value of Collateral		$ 24.4
Federal Home Loan Bank Advances, General Debt Obligations Disclosures, Percentage of Maximum Amount Available		25.00%
Federal Home Loan Bank, Advances, Interest Rate		0.24%
Federal Reserve Advances, General Debt Obligations Disclosures, Loans and Securities Pledged		1.9	2.2
Number of Secured Lines of Credit Facility	3		3
Number of Unsecured Lines of Credit Facility	3		2
Number of Banks	5		4
Line of Credit Facility, Maximum Borrowing Capacity			60
Additional Line of Credit Acquired	10
Correspondent Bank Borrowing Capacity		70
Available as Lendable Collateral [Member]
Note 13 - Borrowings (Details) [Line Items]
Federal Reserve Advances, General Debt Obligations Disclosures, Loans and Securities Pledged		$ 1.8	$ 2.1

The amount of additional lines of credit acquired during period.

No definition available.

Name:	plmt_AdditionalLineOfCreditAcquired
Namespace Prefix:	plmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Borrowing capacity on secured and unsecured lines of credit with correspondent banks.

+ References

No definition available.

+ Details

Name:	plmt_CorrespondentBankBorrowingCapacity
Namespace Prefix:	plmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The maximum amount of Federal Home Loan Bank advances available to the entity expressed as as a percentage of the balance of assets pledged as collateral.

+ References

No definition available.

+ Details

Name:	plmt_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresPercentageOfMaximumAmountAvailable
Namespace Prefix:	plmt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Carrying amount as of the balance sheet date of loans that have been pledged as collateral for Federal Reserve borrowings.

+ References

No definition available.

+ Details

Name:	plmt_FederalReserveAdvancesGeneralDebtObligationsDisclosuresLoansAndSecuritiesPledged
Namespace Prefix:	plmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	plmt_Note13BorrowingsDetailsLineItems
Namespace Prefix:	plmt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of banks that provide lines of credit.

+ References

No definition available.

+ Details

Name:	plmt_NumberOfBanks
Namespace Prefix:	plmt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of secured line of credit facilities that the Bank has access to.

+ References

No definition available.

+ Details

Name:	plmt_NumberOfSecuredLinesOfCreditFacility
Namespace Prefix:	plmt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of unsecured line of credit facilities that the Bank has access to.

+ References

No definition available.

+ Details

Name:	plmt_NumberOfUnsecuredLineOfCreditFacility
Namespace Prefix:	plmt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Interest rate of advances made and reported by Federal Home Loan Bank (FHLBank).

+ References

No definition available.

+ Details

Name:	us-gaap_FederalHomeLoanBankAdvancesInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value of securities pledged as collateral against securities sold under agreement to repurchase.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 55

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226013-175313

+ Details

Name:	us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant