Note 3 - Investment Securities (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	At December 31, 2019
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. Government agencies	$	38,743	$	1	$	(439	)	$	38,305
Collateralized mortgage obligations		329,492		2,368		(422	)		331,438
Agency mortgage-backed securities		98,953		82		(98	)		98,937
Municipal securities		4,064		18		-			4,082
Corporate bonds		69,499		79		(3,298	)		66,280
Total securities available for sale	$	540,751	$	2,548	$	(4,257	)	$	539,042
U.S. Government agencies	$	94,913	$	482	$	(294	)	$	95,101
Collateralized mortgage obligations		416,177		7,603		(793	)		422,987
Agency mortgage-backed securities		133,752		1,782		(513	)		135,021
Total securities held to maturity	$	644,842	$	9,867	$	(1,600	)	$	653,109

	At December 31, 201 8
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Collateralized mortgage obligations	$	197,812	$	567	$	(2,120	)	$	196,259
Agency mortgage-backed securities		39,105		5		(611	)		38,499
Municipal securities		20,807		64		(232	)		20,639
Corporate bonds		62,583		87		(3,396	)		59,274
Asset-backed securities		6,433		-		(90	)		6,343
Total securities available for sale	$	326,740	$	723	$	(6,449	)	$	321,014
U.S. Government agencies	$	107,390	$	-	$	(3,772	)	$	103,618
Collateralized mortgage obligations		500,690		570		(5,793	)		495,467
Agency mortgage-backed securities		153,483		-		(5,245	)		148,238
Total securities held to maturity	$	761,563	$	570	$	(14,810	)	$	747,323

Investments Classified by Contractual Maturity Date [Table Text Block]

	Available for Sale				Held to Maturity
(dollars in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in 1 year or less	$	3,790	$	3,795	$	-	$	-
After 1 year to 5 years		39,653		39,435		20,048		20,073
After 5 years to 10 years		65,863		62,617		74,865		75,028
After 10 years		3,000		2,820		-		-
Collateralized mortgage obligations		329,492		331,438		416,177		422,987
Agency mortgage-backed securities		98,953		98,937		133,752		135,021
Total	$	540,751	$	539,042	$	644,842	$	653,109

Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block]

(dollars in thousands)	201 9		201 8			201 7
Beginning Balance, January 1 st	$	-	$	274		$	937
Reductions for securities sold during the period		-		(274	)		(663	)
Ending Balance, December 31 st	$	-	$	-		$	274

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]

	At December 31, 201 9
	Less than 12 months				12 months or more				Total
(dollars in thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Government agencies	$	28,136	$	439	$	-	$	-	$	28,136	$	439
Collateralized mortgage obligations		63,384		328		6,164		94		69,548		422
Agency mortgage-backed securities		2,924		13		6,411		85		9,335		98
Municipal securities		-		-		-		-		-		-
Corporate bonds		2,820		180		51,882		3,118		54,702		3,298
Total Available for Sale	$	97,264	$	960	$	64,457	$	3,297	$	161,721	$	4,257

	At December 31, 201 9
	Less than 12 months				12 months or more				Total
(dollars in thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Government agencies	$	33,092	$	220	$	3,703	$	74	$	36,795	$	294
Collateralized mortgage obligations		24,211		18		64,324		775		88,535		793
Agency mortgage-backed securities		14,044		33		52,132		480		66,176		513
Total Held to Maturity	$	71,347	$	271	$	120,159	$	1,329	$	191,506	$	1,600

	At December 31, 2018
	Less than 12 months				12 months or more				Total
(dollars in thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Collateralized mortgage obligations	$	58,883	$	270	$	83,377	$	1,850	$	142,260	$	2,120
Agency mortgage-backed securities		1,134		10		16,768		601		17,902		611
Municipal securities		1,549		7		12,154		225		13,703		232
Corporate bonds		-		-		53,189		3,396		53,189		3,396
Asset backed securities		6,343		90		-		-		6,343		90
Total Available for Sale	$	67,909	$	377	$	165,488	$	6,072	$	233,397	$	6,449

	At December 31, 2018
	Less than 12 months				12 months or more				Total
(dollars in thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Government agencies	$	5,351	$	26	$	98,267	$	3,746	$	103,618	$	3,772
Collateralized mortgage obligations		44,574		475		173,467		5,318		218,041		5,793
Agency mortgage-backed securities		-		-		119,243		5,245		119,243		5,245
Total Held to Maturity	$	49,925	$	501	$	390,977	$	14,309	$	440,902	$	14,810