Note 11 - Assets and Liabilities Measured and Reported at Fair Value (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

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

	Fair Value Measurements Using:						Total
March 31, 2021 (in thousands)	Level 1		Level 2		Level 3		Fair Value
Assets:
Available for sale debt securities:
Government sponsored enterprise obligations	$	—	$	130,724	$	—	$	130,724
Mortgage backed securities - government agencies		—		523,131		—		523,131
Obligations of states and political subdivisions		—		18,312		—		18,312
Total available for sale debt securities		—		672,167		—		672,167
Interest rate swaps		—		4,080		—		4,080
Total assets	$	—	$	676,247	$	—	$	676,247
Liabilities:
Interest rate swaps	$	—	$	4,213	$	—	$	4,213

	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
									for the three
	Fair Value Measurements Using:						Total		months ended
March 31, 2021 (in thousands)	Level 1		Level 2		Level 3		Fair Value		March 31, 2021
Collateral dependent loans	$	—	$	—	$	7,571	$	7,571	$	—
Other real estate owned		—		—		281		281		—

									Losses recorded
									for the three
	Fair Value Measurements Using:						Total		months ended
December 31, 2020 (in thousands)	Level 1		Level 2		Level 3		Fair Value		March 31, 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]

	March 31, 2021
(dollars in thousands)	Fair Value		Valuation Technique	Unobservable Inputs	Weighted Average
Collateral dependent loans	$	7,571	Appraisal	Appraisal discounts		10.7	%
Other real estate owned		281	Appraisal	Appraisal discounts		36.0

	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