Borrowings (Details Textual) (USD $)			6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Notes Payable, Other Payables [Member]	Jun. 30, 2014 Federal Home Loan Bank Advances [Member]	Jun. 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]	Jun. 30, 2014 Unsecured Debt [Member]	Jun. 30, 2014 Unused lines of Credit [Member]	Dec. 31, 2013 Unused lines of Credit [Member]	Jun. 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			2.2
Line of Credit Facility, Current Borrowing Capacity				$ 2,400,000,000
Line of Credit Facility, Borrowing Capacity, Description					530,000,000			80,000,000
Loans Pledged as Collateral					662,500,000
Line of Credit Facility, Amount Outstanding					0	106,600,000	0		0	0
Interest-bearing Domestic Deposit, Brokered	$ 88,000,000	$ 49,400,000									$ 48,000,000	$ 49,400,000