Note 3 - Available for Sale Debt Securities (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

(in thousands)	Amortized		Unrealized
June 30, 2021	cost		Gains		Losses			Fair value
U.S. Treasury and other U.S. Government obligations	$	9,078	$	-	$	(1	)	$	9,077
Government sponsored enterprise obligations		150,833		4,271		(124	)		154,980
Mortgage backed securities - government agencies		788,048		4,781		(6,118	)		786,711
Obligations of states and political subdivisions		54,906		355		(128	)		55,133
Other		1,006		1		-			1,007
Total available for sale debt securities	$	1,003,871	$	9,408	$	(6,371	)	$	1,006,908

December 31, 2020
Government sponsored enterprise obligations	$	133,436	$	5,003	$	(361	)	$	138,078
Mortgage backed securities - government agencies		430,198		7,555		(168	)		437,585
Obligations of states and political subdivisions		11,088		227		—			11,315
Total available for sale debt securities	$	574,722	$	12,785	$	(529	)	$	586,978

Investments Classified by Contractual Maturity Date [Table Text Block]

(in thousands)	Amortized cost		Fair value
Due within one year	$	35,028	$	35,160
Due after one year but within five years		21,347		21,535
Due after five years but within 10 years		29,630		29,745
Due after 10 years		129,818		133,757
Mortgage backed securities - government agencies		788,048		786,711
Total available for sale debt securities	$	1,003,871	$	1,006,908

Schedule of Unrealized Loss on Investments [Table Text Block]

	Less than 12 months					12 months or more					Total
(in thousands)	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
June 30, 2021	value		losses			value		losses			value		losses
U.S. Treasury and other U.S. Government obligations	$	9,077	$	(1	)	$	-	$	-		$	9,077	$	(1	)
Government sponsored enterprise obligations		26,808		(111	)		459		(13	)		27,267		(124	)
Mortgage-backed securities - government agencies		504,709		(6,085	)		1,946		(33	)		506,655		(6,118	)
Obligations of states and political subdivisions		19,345		(128	)		—		—			19,345		(128	)
Total	$	559,939	$	(6,325	)	$	2,405	$	(46	)	$	562,344	$	(6,371	)
December 31, 2020
Government sponsored enterprise obligations	$	10,404	$	(112	)	$	24,398	$	(249	)	$	34,802	$	(361	)
Mortgage-backed securities - government agencies		68,033		(167	)		921		(1	)		68,954		(168	)
Total	$	78,437	$	(279	)	$	25,319	$	(250	)	$	103,756	$	(529	)