Mortgage Servicing Rights (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Mortgage Servicing Rights [Abstract]
Cash gain on sale of mortgage loans	$ 659us-gaap_GainLossOnSaleOfMortgageLoans	$ 826us-gaap_GainLossOnSaleOfMortgageLoans	$ 1,113us-gaap_GainLossOnSaleOfMortgageLoans
Originated mortgage servicing rights	339	625	774
Increase (decrease) in accrued mortgage rate lock commitments	(7)	(78)	31
Gain on sale of mortgage loans	1,047us-gaap_GainLossOnSalesOfLoansNet	1,373us-gaap_GainLossOnSalesOfLoansNet	1,918us-gaap_GainLossOnSalesOfLoansNet
Mortgage servicing fee income	691	674	649
Provision for representation and warranty losses on serviced loans	(8)us-gaap_ProvisionForOtherLosses	(294)us-gaap_ProvisionForOtherLosses	0us-gaap_ProvisionForOtherLosses
Foreclosure servicing losses	(4)psbq_ForeclosureServicingLosses	0psbq_ForeclosureServicingLosses	(26)psbq_ForeclosureServicingLosses
Amortization of mortgage servicing rights	(278)	(421)	(547)
Decrease (increase) in servicing right valuation allowance	(19)	259	(199)
Loan servicing fee income, net	382	218	(123)
Mortgage banking income, net	$ 1,373	$ 1,591	$ 1,795

Foreclosure servicing losses.

No definition available.

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- Definition

The periodic amortization (in proportion to and over the period of estimated net servicing income or loss) of capitalized servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeeping services in connection with a mortgage portfolio. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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- Definition

All amounts that are due to the servicer of a financial asset, excluding contractually specified servicing fees and late fees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 2

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- Definition

The noninterest income derived from mortgage banking activities (fees and commissions), excluding fees earned from servicing third-party assets.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 13

-Article 9

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- Definition

The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans made to finance real estate acquisitions. This element refers to the gain (loss) and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

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+ Details

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- Definition

The net gain (loss) resulting from a sale of loans, including adjustments to record loans classified as held-for-sale at the lower-of-cost-or-market and fair value adjustments to loan held for investment purposes.

+ References

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- Definition

Interest and fee income from mortgage loans considered to be held-for-sale.

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-Number 210

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- Definition

The total periodic movement (increases and decreases) in the carrying amount of mortgage loans on real estate.

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- Definition

Amount of expense related to other loss.

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- Definition

The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets.

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New provisions recoveries or charged against this account which increase or reduce the net value of servicing assets.

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