Note 19 - Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2015

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

			Fair Value Measurements Using
(In thousands)	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2015
ASSETS
Available-for-sale securities
U.S. Treasury	$	4,008	$	-	$	4,008	$	-
U.S. Government agencies		346,315		-		346,315		-
Mortgage-backed securities		312,011		-		312,011		-
State and political subdivisions		13,452		-		13,452		-
Other securities		31,597		-		31,597		-
Assets held in trading accounts		6,528		2,809		3,719		-
December 31, 2014
ASSETS
Available-for-sale securities
U.S. Treasury	$	3,992	$	-	$	3,992	$	-
U.S. Government agencies		272,816		-		272,816		-
Mortgage-backed securities		1,572		-		1,572		-
State and political subdivisions		6,540		-		6,540		-
Other securities		20,363		-		20,363		-
Assets held in trading accounts		6,987		3,320		3,667		-

Fair Value Measurements, Nonrecurring [Table Text Block]

			Fair Value Measurements Using
(In thousands)	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2015
ASSETS
Impaired loans (1) (2) (collateral dependent)	$	14,731	$	-	$	-	$	14,731
Foreclosed assets held for sale (1)		2.029		-		-		2,029
December 31, 2014
ASSETS
Impaired loans (1) (2) (collateral dependent)	$	12,276	$	-	$	-	$	12,276
Foreclosed assets held for sale (1)		3,417		-		-		3,417

Fair Value, by Balance Sheet Grouping [Table Text Block]

	Carrying		Fair Value Measurements
(In thousands)	Amount		Level 1		Level 2		Level 3		Total
March 31, 2015
Financial assets:
Cash and cash equivalents	$	685,828	$	685,828	$	--	$	--	$	685,828
Interest bearing balances due from banks - time		25,000		--		24,986		--		24,986
Held-to-maturity securities		902,423		--		913,037		--		913,037
Mortgage loans held for sale		25,513		--		--		25,513		25,513
Interest receivable		24,719		--		24,719		--		24,719
Legacy loans, net		2,086,197		--		--		2,095,657		2,095,657
Loans acquired, not covered by FDIC loss share		2,418,440		--		--		2,429,407		2,429,407
Loans acquired, covered by FDIC loss share		102,468		--		--		102,933		102,933
FDIC indemnification asset		15,965		--		--		15,965		15,965
Financial liabilities:
Non-interest bearing transaction accounts		1,123,966		--		1,123,966		--		1,123,966
Interest bearing transaction accounts and savings deposits		3,627,870		--		3,627,870		--		3,627,870
Time deposits		1,522,872		--		--		1,523,149		1,523,149
Federal funds purchased and securities sold under agreements to repurchase		111,484		--		111,484		--		111,484
Other borrowings		285,060		--		288,198		--		288,198
Subordinated debentures		62,994		--		58,039		--		58,039
Interest payable		2,445		--		2,445		--		2,445
December 31, 2014
Financial assets:
Cash and cash equivalents	$	335,909	$	335,909	$	--	$	--	$	335,909
Held-to-maturity securities		777,587		--		780,533		--		780,533
Mortgage loans held for sale		21,265		--		--		21,265		21,265
Interest receivable		16,774		--		16,774		--		16,774
Legacy loans		2,024,693		--		--		2,022,889		2,022,889
Loans acquired, not covered by FDIC loss share		575,980		--		--		560,651		560,651
Loans acquired, covered by FDIC loss share		106,933		--		--		105,789		105,789
FDIC indemnification asset		22,663		--		--		22,663		22,663
Financial liabilities:
Non-interest bearing transaction accounts		889,260		--		889,260		--		889,260
Interest bearing transaction accounts and savings deposits		2,006,271		--		2,006,271		--		2,006,271
Time deposits		965,187		--		--		967,900		967,900
Federal funds purchased and securities sold under agreements to repurchase		110,586		--		110,586		--		110,586
Other borrowings		114,682		--		114,698		--		114,698
Subordinated debentures		20,620		--		16,115		--		16,115
Interest payable		1,147		--		1,147		--		1,147