Borrowings (Details Textual) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Notes Payable, Other Payables [Member]	Sep. 30, 2014 Federal Home Loan Bank Advances [Member]	Sep. 30, 2014 Federal Home Loan Bank of San Francisco [Member]	Dec. 31, 2013 Federal Home Loan Bank of San Francisco [Member]	Dec. 31, 2013 Federal Home Loan Bank of San Francisco [Member]	Sep. 30, 2014 Unsecured Debt [Member]	Sep. 30, 2014 Unused lines of Credit [Member]	Dec. 31, 2013 Unused lines of Credit [Member]	Sep. 30, 2014 Certificate of Deposit Account Registry Service Program [Member]	Dec. 31, 2013 Certificate of Deposit Account Registry Service Program [Member]
Debt Instrument [Line Items]
Debt Instruments Weighted Average Remaining Maturity Period			2.22
Line of Credit Facility, Current Borrowing Capacity				$ 2,400,000,000
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances				360,000,000
Line of Credit Facility, Borrowing Capacity, Description					1,000,000,000			80,000,000
Loans Pledged as Collateral					1,400,000,000
Line of Credit Facility, Amount Outstanding					0	106,600,000	0		0	0
Interest-bearing Domestic Deposit, Brokered	288,200,000	49,400,000									48,200,000	49,400,000
Brokered Deposits For The Quarter	$ 200,000,000