Commitments and Contingencies - Schedule of Off-Balance Sheet Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Commitments And Contingencies [Line Items]
Commitments to purchase securities	$ 216	$ 9,822
Commitments to extend credit (principally variable rate)	168,073	118,867
Letters of credit and financial guarantees written	$ 832	$ 1,163

Letters Of Credit And Financial Guarantees Outstanding

No definition available.

Name:	pcbk_LettersOfCreditAndFinancialGuaranteesOutstanding
Namespace Prefix:	pcbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant