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Investment Securities: Credit Losses Recognized on Investments Policy (Policies)	3 Months Ended
Jun. 30, 2012
Credit Losses Recognized on Investments Policy:
Credit Losses Recognized on Investments Policy	Credit Losses Recognized on Investments. Certain debt securities have experienced fair value deterioration due to credit losses. The following table provides information about debt securities for which only a credit loss was recognized in income and other losses are recorded in other comprehensive income.

Investment Securities: Credit Losses Recognized on Investments Policy (Policies)

3 Months Ended

Jun. 30, 2012

Credit Losses Recognized on Investments Policy:

Credit Losses Recognized on Investments Policy

Credit Losses Recognized on Investments. Certain debt securities have experienced fair value deterioration due to credit losses.

The following table provides information about debt securities for which only a credit loss was recognized in income and other losses are recorded in other comprehensive income.