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Securities (Details Textual) (USD $)	Jun. 30, 2012 Y MortgageObligation
Securities (Textual) [Abstract]
Gross unrealized losses attributable to collateralized mortgage obligations	$ 1,000,000
Number of fixed rate collateralized mortgage obligations	1
Weighted-average maturity collateralized mortgage, in years	0.2
Pledged available for sale and Held-To-Maturity securities	$ 10,000,000,000

Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered.

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