Note 4 - Loans (Tables)

12 Months Ended

Dec. 31, 2012

Composition Of Loan Portfolio [Text Block]

	December 31,
	2012		2011
Commercial and industrial	$	1,631,474	$	1,458,446
Agricultural		268,618		243,776
Commercial real estate:
Office, retail, and industrial		1,333,191		1,299,082
Multi-family		285,481		288,336
Residential construction		61,462		105,836
Commercial construction		124,954		144,909
Other commercial real estate		773,121		888,146
Total commercial real estate		2,578,209		2,726,309
Total corporate loans		4,478,301		4,428,531
Home equity		390,033		416,194
1-4 family mortgages		282,948		201,099
Installment loans		38,394		42,289
Total consumer loans		711,375		659,582
Total loans, excluding covered loans		5,189,676		5,088,113
Covered loans (1)		197,894		260,502
Total loans	$	5,387,570	$	5,348,615
Deferred loan fees included in total loans	$	5,941	$	7,828
Overdrawn demand deposits included in total loans	$	4,451	$	2,850

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

	December 31,
	2012		2011
Loans pledged to secure:
FHLB advances	$	721,141	$	694,944
Federal term auction facilities		2,097,021		1,971,801
Total	$	2,818,162	$	2,666,745

Schedule of Loans Sold [Table Text Block]

	Proceeds/ Fair Value		Book Value		Charge-offs (1)			Net Gains on Sales (2)
Loan sales in 2012
Bulk loan sales	$	94,470	$	169,577	$	(80,260	)	$	5,153
Mortgage loan sales		52,595		50,326		-			2,269
Other non-performing loan sales		4,200		6,587		(2,387	)		-
Total loan sales in 2012	$	151,265	$	226,490	$	(82,647	)	$	7,422
Loan sales in 2011
Non-accrual loan sales	$	12,362	$	17,087	$	(4,725	)	$	-
Loan sales in 2010
Non-accrual loan sales	$	12,540	$	19,088	$	(6,548	)	$	-
Potential problem loan sales		4,000		11,138		(7,138	)		-
Total loan sales in 2010	$	16,540	$	30,226	$	(13,686	)	$	-

Loans Sold In Bulk Loan Sales [Table Text Block]

	Carrying Amount of Loans Prior to Transfer to Held-for-Sale
	Pass		Potential Problem (1)		Non-accrual		Total		Charge-offs at Date of Transfer		Net Payments Received		Loans Returned to Held-for- Investment		Proceeds From Sales		(Losses) Gains on Sales
Commercial and industrial	$	2,868	$	23,858	$	21,819	$	48,545	$	22,508	$	1,189	$	131	$	19,705	$	(5,012)
Agricultural		-		7,411		1,308		8,719		4,356		(3)		2		3,605		(759)
Commercial real estate:
Office, retail, and industrial		4,272		24,975		20,653		49,900		23,696		360		195		35,488		9,839
Multi-family		-		2,380		1,829		4,209		1,859		166		-		3,151		967
Residential construction		-		8,066		6,900		14,966		5,690		750		-		7,387		(1,139)
Commercial construction		-		2,032		2,026		4,058		1,850		-		-		1,687		(521)
Other commercial real estate		855		29,602		9,903		40,360		19,438		(20)		129		22,464		1,651
Total commercial real estate		5,127		67,055		41,311		113,493		52,533		1,256		324		70,177		10,797
Home equity		1,500		-		57		1,557		773		(4)		-		829		41
1-4 family mortgages		160		-		-		160		90		2		-		154		86
Total consumer loans		1,660		-		57		1,717		863		(2)		-		983		127
Total loans sold in bulk loan sales	$	9,655	$	98,324	$	64,495	$	172,474	$	80,260	$	2,440	$	457	$	94,470		5,153

Schedule of Servicing Assets at Fair Value [Table Text Block]

	Years Ended December 31,
	2012			2011			2010
Balance at the beginning of the year	$	929		$	942		$	1,238
New servicing assets		347			-			-
Total (losses) gains included in earnings (1):
Due to changes in valuation inputs and assumptions (2)		(72	)		179			(28	)
Other changes in fair value (3)		(219	)		(192	)		(268	)
Balance at the end of the year	$	985		$	929		$	942
Contractual servicing fees earned during the year (1)	$	209		$	235		$	301
Total amount of loans being serviced for the benefit of others, at the end of the year	$	109,730		$	78,594		$	114,720