Note 12 - Assets and Liabilities Measured and Reported at Fair Value (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

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

	Fair Value Measurements Using:						Total
June 30, 2021 (in thousands)	Level 1		Level 2		Level 3		Fair Value
Assets:
Available for sale debt securities:
U.S. Treasury and other U.S. Government obligations	$	9,077	$	—	$	—	$	9,077
Government sponsored enterprise obligations		—		154,980		—		154,980
Mortgage backed securities - government agencies		—		786,711		—		786,711
Obligations of states and political subdivisions		—		55,133		—		55,133
Other		—		1,007		—		1,007
Total available for sale debt securities		9,077		997,831		—		1,006,908
Interest rate swaps		—		5,668		—		5,668
Total assets	$	9,077	$	1,003,499	$	—	$	1,012,576
Liabilities:
Interest rate swaps	$	—	$	5,760	$	—	$	5,760

	Fair Value Measurements Using:						Total
December 31, 2020 (in thousands)	Level 1		Level 2		Level 3		Fair Value
Assets:
Available for sale debt securities:
Government sponsored enterprise obligations	$	—	$	138,078	$	—	$	138,078
Mortgage backed securities - government agencies		—		437,585		—		437,585
Obligations of states and political subdivisions		—		11,315		—		11,315
Total available for sale debt securities		—		586,978		—		586,978
Interest rate swaps		—		8,374		—		8,374
Total assets	$	—	$	595,352	$	—	$	595,352
Liabilities:
Interest rate swaps	$	—	$	8,391	$	—	$	8,391

Fair Value Measurements, Nonrecurring [Table Text Block]

									Losses recorded
									Three months		Six months
	Fair Value Measurements Using:						Total		ended		ended
June 30, 2021 (in thousands)	Level 1		Level 2		Level 3		Fair Value		June 30, 2021		June 30, 2021
Collateral dependent loans	$	—	$	—	$	12,416	$	12,416	$	—	$	—
Other real estate owned		—		—		648		648		—		—

									Losses recorded
									Three months		Six months
	Fair Value Measurements Using:						Total		ended		ended
December 31, 2020 (in thousands)	Level 1		Level 2		Level 3		Fair Value		June 30, 2020		June 30, 2020
Impaired loans	$	—	$	—	$	7,546	$	7,546	$	—	$	—
Other real estate owned		—		—		281		281		—		—

Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]

	June 30, 2021
(dollars in thousands)	Fair Value		Valuation Technique	Unobservable Inputs	Weighted Average
Collateral dependent loans	$	12,416	Appraisal	Appraisal discounts		27.1	%
Other real estate owned		648	Appraisal	Appraisal discounts		40.8

	December 31, 2020
(dollars in thousands)	Fair Value		Valuation Technique	Unobservable Inputs	Weighted Average
Impaired loans - collateral dependent	$	7,546	Appraisal	Appraisal discounts		10.7	%
Other real estate owned		281	Appraisal	Appraisal discounts		36.0