Represents the amount of cash the Company's shareholders will have the right to receive for each share of the Company's common stock in lieu of shares of United common stock pursuant to the merger.

No definition available.

+ Details

Name:	plmt_BusinessAcquisitionRightToReceiveCashPerShareOfCommonStock
Namespace Prefix:	plmt_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of shares of United common stock the Company's shareholders will have the right to receive for each share of the Company's common stock in lieu of cash per share pursuant to the merger.

+ References

No definition available.

+ Details

Name:	plmt_BusinessAcquisitionRightToReceiveSharesOfCommonStock
Namespace Prefix:	plmt_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

Name:	plmt_Note2ProposedMergerwithUnitedCommunityBanksIncDetailsLineItems
Namespace Prefix:	plmt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percent of outstanding shares in the exchange.

+ References

No definition available.

+ Details

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

- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 25

-Paragraph 23

-URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460

+ Details

Name:	us-gaap_BusinessCombinationAcquisitionRelatedCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionAxis=plmt_UnitedCommunityBanksIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=plmt_ExchangedForCashMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=plmt_ExchangedForCommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 2 - Proposed Merger with United Community Banks, Inc. (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2015	Apr. 22, 2015
Note 2 - Proposed Merger with United Community Banks, Inc. (Details) [Line Items]
Business Combination, Acquisition Related Costs (in Dollars)	$ 1,361	$ 1,373
United Community Banks Inc [Member]
Note 2 - Proposed Merger with United Community Banks, Inc. (Details) [Line Items]
Business Acquisition, Right to Receive Shares of Common Stock (in Shares)			0.97
Business Acquisition, Right to Receive Cash Per Share of Common Stock (in Dollars per share)			$ 19.25
Business Combination, Acquisition Related Costs (in Dollars)		$ 1,400
United Community Banks Inc [Member] \| Exchanged for Cash [Member]
Note 2 - Proposed Merger with United Community Banks, Inc. (Details) [Line Items]
Percent of Outstanding Common Stock Exchanged			30.00%
United Community Banks Inc [Member] \| Exchanged for Common Stock [Member]
Note 2 - Proposed Merger with United Community Banks, Inc. (Details) [Line Items]
Percent of Outstanding Common Stock Exchanged			70.00%