Short-term Borrowings/Other Borrowings	12 Months Ended
Short-term Borrowings/Other Borrowings	Dec. 31, 2012
Short term Borrowings/Other Borrowings [Abstract]
Short-term Borrowings/Other Borrowings	7. Short-term Borrowings/Other Borrowings At December 31, 2012, the Company had collateralized and uncollateralized lines of credit with the Federal Reserve Bank of San Francisco totaling $217.8 million, as well as Federal Home Loan Bank ("FHLB") lines of credit totaling $10.5 million. At December 31, 2012, the Company had no outstanding borrowing balances .The weighted average cost of borrowings for the year ended December 31, 2012 was 0.00%. These lines of credit generally have interest rates tied to the Federal Funds rate or are indexed to short-term U.S. Treasury rates or LIBOR. FHLB advances are collateralized by all of the Company's stock in the FHLB, investment securities, and certain qualifying mortgage loans. As of December 31, 2012, $11.1 million in investment securities at FHLB were pledged as collateral for FHLB advances. Additionally, $324.5 million in real estate-secured loans were pledged at December 31, 2012 as collateral for used and unused borrowing lines with the Federal Reserve Bank totaling $217.8 million. All lines of credit are on an "as available" basis and can be revoked by the grantor at any time. The Company had collateralized and uncollateralized lines of credit with the Federal Reserve Bank of San Francisco totaling $250.1 million, as well as Federal Home Loan Bank ("FHLB") lines of credit totaling $17.6 million at December 31, 2011. At December 31, 2011, the Company had no outstanding borrowing balances. The weighted average cost of borrowings for the year ended December 31, 2012 was 0.73%.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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