Note 4 - Securities (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

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

			Gross		Gross
	Amortized		Unrealized		Unrealized			Market
	Cost		Gain		Loss			Value
June 30, 2020	(In Thousands)
Securities Available for Sale
U.S. Treasury securities	$	39,978	$	604	$	-		$	40,582
Government agencies		15,225		350		-			15,575
Mortgage-backed securities		497,442		19,594		-			517,036
State and municipal securities		45,060		517		-			45,577
Corporate debt		234,924		3,469		(1,035	)		237,358
Total	$	832,629	$	24,534	$	(1,035	)	$	856,128
Securities Held to Maturity
State and municipal securities		250		-		-			250
Total	$	250	$	-	$	-		$	250
December 31, 2019
Securities Available for Sale
U.S. Treasury securities	$	48,923	$	291	$	(4	)	$	49,210
Government agencies		18,245		143		(2	)		18,386
Mortgage-backed securities		470,513		4,859		(1,318	)		474,054
State and municipal securities		56,951		335		(14	)		57,272
Corporate debt		157,549		3,098		(170	)		160,477
Total	$	752,181	$	8,726	$	(1,508	)	$	759,399
Securities Held to Maturity
State and municipal securities		250		-		-			250
Total	$	250	$	-	$	-		$	250

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

	June 30, 2020				December 31, 2019
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(In thousands)
Debt securities available for sale
Due within one year	$	50,291	$	50,553	$	58,722	$	58,975
Due from one to five years		79,483		81,473		90,034		91,005
Due from five to ten years		187,295		188,814		129,501		131,914
Due after ten years		18,118		18,252		3,411		3,451
Mortgage-backed securities		497,442		517,036		470,513		474,054
	$	832,629	$	856,128	$	752,181	$	759,399
Debt securities held to maturity
Due from one to five years	$	250	$	250	$	250	$	250
	$	250	$	250	$	250	$	250

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)
June 30, 2020
U.S. Treasury and government sponsored agencies	$	-		$	-	$	-		$	-	$	-		$	-
Mortgage-backed securities		-			-		-			-		-			-
State and municipal securities (1)		-			-		-			307		-			307
Corporate debt		(1,035	)		68,711		-			-		(1,035	)		68,711
Total	$	(1,035	)	$	68,711	$	-		$	307	$	(1,035	)	$	69,018
(1) The municipal security with an unrealized loss for twelve months or more has an unrealized loss of $129.60.
December 31, 2019
U.S. Treasury and government sponsored agencies	$	(6	)	$	3,278	$	-		$	-	$	(6	)	$	3,278
Mortgage-backed securities		(1,206	)		153,330		(112	)		24,911		(1,318	)		178,241
State and municipal securities		(4	)		1,900		(10	)		2,647		(14	)		4,547
Corporate debt		(170	)		19,981		-			-		(170	)		19,981
Total	$	(1,386	)	$	178,489	$	(122	)	$	27,558	$	(1,508	)	$	206,047