Note 4 - Securities (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

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

			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gain		Loss			Value
June 30, 2022	(In Thousands)
Debt Securities Available for Sale
U.S. Treasury Securities	$	6,004	$	-	$	(38	)	$	5,966
Government Agency Securities		14		-		-			14
Mortgage-backed securities		308,033		43		(22,648	)		285,428
State and municipal securities		17,446		5		(1,171	)		16,280
Corporate debt		427,688		618		(11,531	)		416,775
Total	$	759,185	$	666	$	(35,388	)	$	724,463
Debt Securities Held to Maturity
U.S. Treasury Securities	$	506,246	$	-	$	(22,750	)	$	483,496
Mortgage-backed securities		551,480		56		(38,538	)		512,998
State and municipal securities		8,030		-		(683	)		7,347
Total	$	1,065,755	$	56	$	(61,971	)	$	1,003,840
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]

	June 30, 2022				December 31, 2021
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(In thousands)
Debt securities available for sale
Due within one year	$	24,683	$	24,590	$	32,913	$	33,232
Due from one to five years		62,123		61,391		31,760		32,307
Due from five to ten years		361,346		350,109		338,407		348,594
Due after ten years		3,000		2,945		3,094		3,276
Mortgage-backed securities		308,033		285,428		424,372		425,161
	$	759,185	$	724,463	$	830,546	$	842,570
Debt securities held to maturity
Due within one year	$	250	$	250	$	250	$	250
Due from one to five years		385,593		373,926		49,663		49,419
Due from five to ten years		128,432		116,667		102,403		101,996
Mortgage-backed securities		551,480		512,998		310,641		314,621
	$	1,065,755	$	1,003,840	$	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
June 30, 2022	(In Thousands)
Debt Securities available for sale
U.S. Treasury Securities	$	(38	)	$	5,966	$	-		$	-	$	(38	)	$	5,966
Mortgage-backed securities		(20,147	)		261,595		(2,501	)		22,005		(22,648	)		283,600
State and municipal securities		(1,112	)		11,613		(59	)		410		(1,171	)		12,023
Corporate debt		(11,366	)		327,226		(165	)		1,335		(11,531	)		328,561
Total	$	(32,664	)	$	606,400	$	(2,724	)	$	23,751	$	(35,388	)	$	630,151
Debt Securities held to maturity
U.S. Treasury Securities	$	(22,750	)	$	483,496	$	-		$	-	$	(22,750	)	$	483,496
Mortgage-backed securities		(34,900	)		481,201		(3,639	)		21,918		(38,538	)		503,119
State and municipal securities		(683	)		7,097		-			-		(683	)		7,097
Total	$	(58,333	)	$	971,794	$	(3,639	)	$	21,918	$	(61,971	)	$	993,712
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	$	(1,950	)	$	258,372	$	-		$	-	$	(1,949	)	$	258,372

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

	Three Months Ended June 30,					Six Months Ended June 30,
	2022			2021		2022			2021
	(In Thousands)
Sale and call proceeds	$	33,425		$	6,272	$	75,036		$	6,272
Gross realized gains	$	-		$	620	$	-		$	620
Gross realized losses		(2,833	)		-		(6,168	)		-
Net realized gain (loss)	$	(2,833	)	$	620	$	(6,168	)	$	620