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Investment Securities (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Jun. 30, 2012	Jun. 30, 2011
Cumulative roll forward of credit losses recognized in earnings for debt securities for which a portion of the OTTI is recognized in OCI:
Beginning balance	$ 6,536	$ 4,778	$ 6,536	$ 4,778
Additions for credit losses on securities not previously recognized
Additions for credit losses on securities previously recognized			527
Reduction for increases in cash flows
Reduction for securities management no longer intends to hold to recovery
Reduction for securities sold/realized losses
Ending balance	$ 6,536	$ 4,778	$ 6,536	$ 4,778

X

- Definition

This item represents an increase to the cumulative amount of credit losses recognized in earnings for an other than temporary impairment (OTTI) of a debt security held for which a previous OTTI was recognized and the investor does not intend to sell the debt security and it is not more likely than not that the investor will be required to sell the debt security before recovery of its amortized cost basis.

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The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity).

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