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The change in unrealized gains (losses) recorded in accumulated other comprehensive income (loss) consisted of the following: 

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The following tables show the gross unrealized losses and fair value of our available for sale and held to maturity investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, as of the dates indicated: 

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During 2012, there was an immaterial amount of credit losses recognized in earnings and in 2011, there were no credit losses recognized in earnings. 

