Retirement Plans and Other Postretirement Benefits (Details Narrative) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Retirement Plans And Other Postretirement Benefits Details Narrative
401(k) plan description	PSB has established a 401(k) profit sharing plan for its employees. PSB matches 100% of employees salary deferrals up to the first 1% of pay deferred and 50% of salary deferrals of the next 5% of pay deferrals, for a maximum match of 3.5% of salary. PSB may also declare a discretionaly profit sharing contribution.
Expense recognized for contributions to the 401(k) plan	$ 509	$ 470	$ 446
Deferred compensation agreement description	PSB maintains deferred compensation arrangements with certain executives and directors. PSB matches 20% of the amount of employees salary deferrals up to the first 15% of pay deferred. PSB directors may elect to defer earned directors fees into a separate deferred directors fees plan. No PSB match is made on deferred director fees. Cumulative balances earn a crediting rate generally equal to 100% of PSBs return on average equity subject to a maximum crediting rate of 15% per year. The agreements provide for benefits to be paid in a lump sum at retirement or in monthly installments for a period up to 15 years following each participant normal retirement date.
Deferred compensation liability outstanding	2,855	2,378
Deferred compensation expense	301	232	215
Postretirement health care benefit plan description	PSB maintains an unfunded, postretirement health care benefit plan for certain currently retired bank officers and their spouses. Benefits were earned by these participants prior to their retirement and prior to curtailments of the plan during 2003 and 2005. Under the plan, PSB pays 30% to 50% of health insurance premiums depending on years of service at retirement. Plan benefits for these retired officers and spouses continue until the officers death. No current employees are eligible for this plan.
Postretirement health care plan liability outstanding	39	78
Postretirement health care benefit plan (income) expense	$ (34)	$ (25)