Note 22 - Fair Value (Detail) - Fair Value Measurements (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Total trading securities	$ 14,162		$ 14,469
CDOs	12,129	[1]	13,394	[1]	14,858	[1]	11,728
Total securities available-for-sale	1,082,403		1,013,006
Derivative liabilities (2)	(2,270)		(2,459)
Fair Value, Inputs, Level 1 [Member]
Money market funds	1,554		1,565
Mutual funds	12,608		12,904
Total trading securities	14,162		14,469
Other equity securities	43		41
Total securities available-for-sale	43		41
Mortgage servicing rights (1)		[2]		[2]
Derivative liabilities (2)		[3]		[3]
Fair Value, Inputs, Level 2 [Member]
U.S. agency securities	508		5,035
CMOs	400,383		384,104
Other residential MBSs	122,900		87,691
Municipal securities	520,043		490,071
Corporate debt securities	15,339		30,014
Hedge fund investment	1,616		1,616
Other equity securities	9,442		1,040
Total securities available-for-sale	1,070,231		999,571
Mortgage servicing rights (1)		[2]		[2]
Derivative liabilities (2)	2,270	[3]	2,459	[3]
Fair Value, Inputs, Level 3 [Member]
CDOs	12,129		13,394
Total securities available-for-sale	12,129		13,394
Mortgage servicing rights (1)	985	[2]	929	[2]
Derivative liabilities (2)		[3]		[3]

[1] There were no purchases, sales, issuances, or settlements of CDOs during the periods presented.

[2] Included in other assets in the Consolidated Statements of Financial Condition.

[3] Included in other liabilities in the Consolidated Statements of Financial Condition.