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Investment Securities (Details 3) (USD $) In Thousands	3 Months Ended		6 Months Ended
Investment Securities (Details 3) (USD $) In Thousands	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Available-for-sale securities
Impairment losses recognized in earnings on other-than-temporarily impaired securities	$ 294	$ 506	$ 458	$ 1,509
CMOs - Non-agency
Available-for-sale securities
Impairment losses recognized in earnings on other-than-temporarily impaired securities	294	212	458	1,215
Perpetual preferred stock
Available-for-sale securities
Impairment losses recognized in earnings on other-than-temporarily impaired securities		294		294
Total debt securities
Credit related other-than-temporary impairment recognized in earnings
Balance, beginning of period	19,609	18,710	19,445	17,707
Subsequent credit-related impairment	294	186	458	1,189
Initial credit-related impairment		26		26
Balance, end of period	$ 19,903	$ 18,922	$ 19,903	$ 18,922

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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- Definition

The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting.

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