| Disclosure of accounting policy for investments in debt securities (which may include mandatorily redeemable preferred shares or preferred shares redeemable at the investing Company's option) that are classified as held-to-maturity. This policy also may describe the entity's accounting treatment for transfers between investment categories, how the entity determines whether impairments of held-to-maturity securities are other than temporary, and how the fair values of such securities are determined. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
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