Note 16 - Disclosures About Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

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

			Fair Value Measurements
(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)
December 31, 2016
ASSETS
Available-for-sale securities
U.S. Treasury	$	300	$	300	$	--	$	--
U.S. Government agencies		137,771		--		137,771		--
Mortgage-backed securities		868,324		--		868,324		--
States and political subdivisions		102,943		--		102,943		--
Other securities		48,016		--		39,876		--
Assets held in trading accounts		41		--		41		--
December 31, 2015
ASSETS
Available-for-sale securities
U.S. Treasury	$	3,994	$	3,994	$	--	$	--
U.S. Government agencies		120,237		--		120,237		--
Mortgage-backed securities		647,426		--		647,426		--
States and political subdivisions		9,874		--		9,874		--
Other securities		39,876		--		39,876		--
Assets held in trading accounts		4,422		2,409		2,013		--

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)
December 31, 2016
Impaired loans (1) (2) (collateral dependent)	$	17,154	$	--	$	--	$	17,154
Foreclosed assets held for sale (1)		17,806		--		--		17,806
December 31, 2015
Impaired loans (1) (2) (collateral dependent)	$	19,027	$	--	$	--	$	19,027
Foreclosed assets held for sale (1)		14,459		--		--		14,459

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

	Carrying		Fair Value Measurements
(In thousands)	Amount		Level 1		Level 2		Level 3		Total
December 31, 2016
Financial assets:
Cash and cash equivalents	$	285,659	$	285,659	$	--	$	--	$	285,659
Interest bearing balances due from banks - time		4,563		--		4,563		--		4,563
Held-to-maturity securities		462,096		--		465,960		--		465,960
Mortgage loans held for sale		27,788		--		--		27,788		27,788
Interest receivable		27,788		--		27,788		--		27,788
Legacy loans (net of allowance)		4,290,921		--		--		4,305,165		4,305,165
Loans acquired (net of allowance)		1,305,683		--		--		1,310,017		1,310,017
Financial liabilities:
Non-interest bearing transaction accounts		1,491,676		--		1,491,676		--		1,491,676
Interest bearing transaction accounts and savings deposits		3,956,483		--		3,956,483		--		3,956,483
Time deposits		1,287,060		--		--		1,278,339		1,278,339
Federal funds purchased and securities sold under agreements to repurchase		115,029		--		115,029		--		115,029
Other borrowings		273,159		--		292,367		--		292,367
Subordinated debentures		60,397		--		55,318		--		55,318
Interest payable		1,668		--		1,668		--		1,668
December 31, 2015
Financial assets
Cash and cash equivalents	$	252,262	$	252,262	$	--	$	--	$	252,262
Interest bearing balances due from banks - time		14,107		--		14,105		--		14,105
Held-to-maturity securities		705,373		--		713,371		--		713,371
Mortgage loans held for sale		30,265		--		--		30,265		30,265
Interest receivable		25,793		--		25,793		--		25,793
Legacy loans (net of allowance)		3,215,103		--		--		3,204,153		3,204,153
Loans acquired (net of allowance)		1,672,901		--		--		1,667,204		1,667,204
Financial liabilities:
Non-interest bearing transaction accounts		1,280,234		--		1,280,234		--		1,280,234
Interest bearing transaction accounts and savings deposits		3,485,845		--		3,485,845		--		3,485,845
Time deposits		1,320,017		--		--		1,315,254		1,315,254
Federal funds purchased and securities sold under agreements to repurchase		99,398		--		99,398		--		99,398
Other borrowings		162,289		--		168,254		--		168,254
Subordinated debentures		60,570		--		55,954		--		55,954
Interest payable		1,800		--		1,800		--		1,800