Note 4 - Securities (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

Unrealized Gain (Loss) on Investments [Table Text Block]

	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
March 31, 2022	(In Thousands)
Debt Securities Available for Sale
U.S. Treasury Securities	$	6,005	$	14	$	(9	)	$	6,010
Government Agency Securities		14		-		-			14
Mortgage-backed securities		356,119		200		(17,185	)		339,134
State and municipal securities		20,350		23		(707	)		19,666
Corporate debt		420,826		4,075		(5,052	)		419,849
Total	$	803,314	$	4,312	$	(22,953	)	$	784,673
Debt Securities Held to Maturity
U.S. Treasury Securities	$	346,414	$	16	$	(14,370	)	$	332,060
Mortgage-backed securities		478,865		383		(19,542	)		459,706
State and municipal securities		8,025		-		(444	)		7,581
Total	$	833,304	$	399	$	(34,356	)	$	799,347
December 31, 2021
Debt Securities Available for Sale
U.S. Treasury Securities	$	9,003	$	101	$	-		$	9,104
Government Agency Securities		6,022		19		-			6,041
Mortgage-backed securities		424,372		3,474		(2,685	)		425,161
State and municipal securities		21,531		173		(70	)		21,634
Corporate debt		369,618		11,659		(647	)		380,630
Total	$	830,546	$	15,425	$	(3,402	)	$	842,570
Debt Securities Held to Maturity
U.S. Treasury Securities	$	149,263	$	25	$	(668	)	$	148,620
Mortgage-backed securities		310,641		5,251		(1,271	)		314,621
State and municipal securities		3,053		2		(10	)		3,045
Total	$	462,957	$	5,278	$	(1,949	)	$	466,286

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

	March 31, 2022				December 31, 2021
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(In thousands)
Debt securities available for sale
Due within one year	$	26,302	$	26,389	$	32,913	$	33,232
Due from one to five years		64,413		64,291		31,760		32,307
Due from five to ten years		346,386		344,765		338,407		348,594
Due after ten years		10,094		10,094		3,094		3,276
Mortgage-backed securities		356,119		339,134		424,372		425,161
	$	803,314	$	784,673	$	830,546	$	842,570
Debt securities held to maturity
Due within one year	$	250	$	250	$	250	$	250
Due from one to five years		225,279		217,987		49,663		49,419
Due from five to ten years		128,910		121,403		102,403		101,996
Mortgage-backed securities		478,865		459,706		310,641		314,621
Total	$	833,304	$	799,347	$	462,957	$	466,286

Gain (Loss) on Securities [Table Text Block]

	Less Than Twelve Months					Twelve Months or More					Total
	Gross					Gross					Gross
	Unrealized					Unrealized					Unrealized
	Losses			Fair Value		Losses			Fair Value		Losses			Fair Value
	(In Thousands)
March 31, 2022
Debt Securities available for sale
U.S. Treasury Securities	$	(9	)	$	2,997	$	-		$	-	$	(9	)	$	2,997
Mortgage-backed securities		(13,930	)		273,725		(3,254	)		45,759		(17,185	)		319,485
State and municipal securities		(664	)		11,203		(43	)		427		(707	)		11,630
Corporate debt		(5,052	)		191,204		-			-		(5,052	)		191,204
Total	$	(19,655	)	$	479,129	$	(3,297	)	$	46,186	$	(22,953	)	$	525,315
Debt Securities held to maturity
U.S. Treasury Securities	$	(14,370	)	$	284,429	$	-		$	-	$	(14,370	)	$	284,429
Mortgage-backed securities		(18,096	)		407,781		(1,446	)		14,767		(19,542	)		422,549
State and municipal securities		(444	)		7,331		-			-		(444	)		7,331
Total	$	(32,910	)	$	699,541	$	(1,446	)	$	14,767	$	(34,356	)	$	714,308
December 31, 2021
Debt Securities available for sale
Mortgage-backed securities		(2,685	)		303,297		-			-		(2,685	)		303,297
State and municipal securities		(61	)		5,198		(9	)		228		(70	)		5,426
Corporate debt		(647	)		61,677		-			-		(647	)		61,677
Total	$	(3,393	)	$	370,172	$	(9	)	$	228	$	(3,402	)	$	370,400
Debt Securities held to maturity
U.S. Treasury Securities	$	(668	)	$	123,698	$	-		$	-	$	(668	)	$	123,698
Mortgage-backed securities		(1,271	)		134,192		-			-		(1,271	)		134,192
State and municipal securities		(10	)		482		-			-		(10	)		482
Total	$	(1,949	)	$	258,372	$	-		$	-	$	(1,949	)	$	258,372

Debt Securities, Available-for-Sale [Table Text Block]

	Three Months Ended March 31,
	2022			2021
	(In Thousands)
Sale proceeds	$	45,394		$	-
Gross realized losses		(3,335	)		-
Net realized losses	$	(3,335	)	$	-