Note 4 - Loans (Detail) - Book Value of Loans Pledged (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Loans pledged to secure:
Federal Home Loan Bank advances	$ 694,944	$ 573,743
Federal term auction facilities	1,971,801	1,968,947
Total	$ 2,666,745	$ 2,542,690

The sum of the carrying amounts, as of the date of the latest financial statement presented, of loans receivable which are owned but transferred to serve as collateral for the payment of related debt obligations, primarily secured borrowings and repurchase agreements, and for which the transferees are not permitted to sell or re-pledge them to an unrelated party.

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The carrying amount, as of the date of the latest financial statement presented, of loans receivable which are owned but transferred to serve as collateral for the payment of FHLB debt obligations, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party.

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- Definition

The carrying amount, as of the date of the latest financial statement presented, of loans receivable which are owned but transferred to serve as collateral for the payment of other debt obligations, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party.

+ References+ Details