Deposits and Borrowed Funds (Details 4) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Maturity distribution of subordinated and long-term debt
2013	$ 215,800,000
Thereafter	482,000,000
Total subordinated and long-term debt	697,778,000	704,971,000
Remaining borrowing capacity secured by collateral with Federal Home Loan Bank of San Francisco	3,860,000,000
Subordinated debt
Maturity distribution of subordinated and long-term debt
Thereafter	179,500,000
Total subordinated and long-term debt	179,500,000
Long-term debt
Maturity distribution of subordinated and long-term debt
2013	215,800,000
Thereafter	302,500,000
Total subordinated and long-term debt	$ 518,300,000