Note 4 - Loans (Tables)

12 Months Ended

Dec. 31, 2011

Composition Of Loan Portfolio [Text Block]

	December 31,
	2011		2010
Commercial and industrial	$	1,458,446	$	1,465,903
Agricultural		243,776		227,756
Commercial real estate:
Office, retail, and industrial		1,299,082		1,203,613
Multi-family		288,336		349,862
Residential construction		105,836		174,690
Commercial construction		144,909		164,472
Other commercial real estate		888,146		856,357
Total commercial real estate		2,726,309		2,748,994
Total corporate loans		4,428,531		4,442,653
Home equity		416,194		445,243
1-4 family mortgages		201,099		160,890
Installment loans		42,289		51,774
Total consumer loans		659,582		657,907
Total loans, excluding covered loans		5,088,113		5,100,560
Covered loans (1)		260,502		371,729
Total loans	$	5,348,615	$	5,472,289
Deferred loan fees included in total loans	$	7,828	$	8,042
Overdrawn demand deposits included in total loans	$	2,850	$	4,281

Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]

	December 31,
	2011		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