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Note 5. Held to Maturity Securities (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Held-to-maturity Securities Pledged as Collateral	$ 77.5	$ 114.5
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	14

Disclosure regarding factors used to determine that the impairment of securities categorized as held-to-maturity where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the held-to-maturity investments determined to be temporarily impaired.

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