Note 10 - Borrowed Funds (Detail) - Unused Short-Term Credit Lines Available for Use (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Available federal funds lines (1)	$ 528,000	[1]	$ 650,000	[1]
Federal Reserve Bank Discount Window’s primary credit program	$ 1,460,313		$ 1,467,052

[1] Subject to the liquidity position of other banks.