Fair Value Measurements (Details) (USD $)	12 Months Ended
Dec. 31, 2012
Fair Value Measurements Details
Direct annual servicing cost per loan	$ 50
Direct annual servicing cost per loan in process of foreclosure	$ 500
Weighted average prepayment speed: CPR	59.90%
Weighted average prepayment speed: PSA	1300.04%
Weighted average discount rate	8.19%
Asset reinvestment rate	4.00%
Short-term cost of funds	0.25%
Escrow inflation adjustment	1.00%
Servicing cost inflation adjustment	1.00%

The rate of asset reinvestment, used as an input to measure fair value.

No definition available.

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- Definition

The direct annual service cost per loan, used as an input to measure fair value.

+ References

No definition available.

+ Details

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Namespace Prefix:	PSBQ_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The direct annual service cost per loan that is in the process of foreclosure, used as an input to measure fair value.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Rate utilized to adjust funds held in escrow by an inflation factor, used as an input to measure fair value.

+ References

No definition available.

+ Details

Name:	PSBQ_EscrowInflationAdjustment
Namespace Prefix:	PSBQ_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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- Definition

Rate utilized to adjust servicing cost by an inflation factor, to present financial information on an inflation-adjusted basis, used as an input to measure fair value.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

The short-term interest rate for borrowing funds, used as an input to measure fair value.

+ References

No definition available.

+ Details

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Namespace Prefix:	PSBQ_
Data Type:	num:percentItemType
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Period Type:	duration

- Definition

The weighted average conditional prepayment rate (CPR). The CPR is a loan prepayment rate equal to the proportion of the principal of a pool of loans that is assumed to be paid off prematurely in each period, used as an input to measure fair value.

+ References

No definition available.

+ Details

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- Definition

The weighted average Public Securities Association Standard Prepayment Model rate (PSA). The PSA is an assumed monthly rate of prepayment that is annualized to the outstanding principal balance of a mortgage loan, used as an input to measure fair value.

+ References

No definition available.

+ Details

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

+ Details

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