Note 5 - Investment Securities (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

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

	At June 3 0 , 2018
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Collateralized mortgage obligations	$	361,142	$	-	$	(14,200	)	$	346,942
Agency mortgage-backed securities		71,668		1		(2,287	)		69,382
Municipal securities		19,042		6		(470	)		18,578
Corporate bonds		62,626		94		(3,106	)		59,614
Asset-backed securities		6,982		-		(24	)		6,958
Trust preferred securities		725		-		(178	)		547
Total securities available for sale	$	522,185	$	101	$	(20,265	)	$	502,021
U.S. Government agencies	$	114,259	$	-	$	(5,513	)	$	108,746
Collateralized mortgage obligations		254,746		31		(7,775	)		247,002
Agency mortgage-backed securities		134,737		-		(6,491	)		128,246
Total securities held to maturity	$	503,742	$	31	$	(19,779	)	$	483,994

	At December 31, 2017
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Collateralized mortgage obligations	$	327,972	$	-	$	(7,731	)	$	320,241
Agency mortgage-backed securities		55,664		2		(800	)		54,866
Municipal securities		15,142		20		(62	)		15,100
Corporate bonds		62,670		103		(2,491	)		60,282
Asset-backed securities		13,414		38		-			13,452
Trust preferred securities		725		-		(236	)		489
Total securities available for sale	$	475,587	$	163	$	(11,320	)	$	464,430
U.S. Government agencies	$	112,605	$	50	$	(2,235	)	$	110,420
Collateralized mortgage obligations		215,567		314		(3,970	)		211,911
Agency mortgage-backed securities		143,041		47		(2,620	)		140,468
Other securities		1,000		-		-			1,000
Total securities held to maturity	$	472,213	$	411	$	(8,825	)	$	463,799

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	$	2,920	$	2,920	$	-	$	-
After 1 year to 5 years		6,902		6,880		15,774		15,400
After 5 years to 10 years		74,320		70,685		98,485		93,346
After 10 years		5,233		5,212		-		-
Collateralized mortgage obligations		361,142		346,942		254,746		247,002
Agency mortgage-backed securities		71,668		69,382		134,737		128,246
Total	$	522,185	$	502,021	$	503,742	$	483,994

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

(dollars in thousands)	201 8		201 7
Beginning Balance, January 1 st	$	274	$	937
Additional credit-related impairment loss on securities for which an other-than-temporary impairment was previously recognized		-		-
Reductions for securities sold during the period		-		(483	)
Ending Balance, June 30 th	$	274	$	454

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

	At June 3 0 , 201 8
	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	$	185,402	$	5,287	$	161,540	$	8,913	$	346,942	$	14,200
Agency mortgage-backed securities		44,035		1,134		21,087		1,153		65,122		2,287
Municipal securities		13,384		319		2,540		151		15,924		470
Corporate bonds		1,627		2		51,896		3,104		53,523		3,106
Asset backed securities		6,958		24		-		-		6,958		24
Trust preferred securities		-		-		547		178		547		178
Total Available for Sale	$	251,406	$	6,766	$	237,610	$	13,499	$	489,016	$	20,265

	At June 3 0 , 201 8
	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	$	53,366	$	1,772	$	55,380	$	3,741	$	108,746	$	5,513
Collateralized mortgage obligations		127,961		2,607		114,305		5,168		242,266		7,775
Agency mortgage-backed securities		52,667		1,975		75.579		4,516		128.246		6,491
Total Held to Maturity	$	233,994	$	6,354	$	245,264	$	13,425	$	479,258	$	19,779

	At December 31, 2017
	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	$	150,075	$	1,565	$	170,166	$	6,166	$	320,241	$	7,731
Agency mortgage-backed securities		29,967		226		21,045		574		51,012		800
Municipal securities		5,742		27		2,656		35		8,398		62
Corporate bonds		-		-		52,509		2,491		52,509		2,491
Asset backed securities		-		-		-		-		-		-
Trust preferred securities		-		-		489		236		489		236
Total Available for Sale	$	185,784	$	1,818	$	246,865	$	9,502	$	432,649	$	11,320

	At December 31, 2017
	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	$	42,045	$	213	$	59,594	$	2,022	$	101,639	$	2,235
Collateralized mortgage obligations		56,955		767		107,986		3,203		164,941		3,970
Agency mortgage-backed securities		55,170		221		82,479		2,399		137,649		2,620
Total Held to Maturity	$	154,170	$	1,201	$	250,059	$	7,624	$	404,229	$	8,825

Schedule of Trust Preferred Securities [Table Text Block]

(dollars in thousands)	Class / Tranche	Amortized Cost		Fair Value		Unrealized Losses			Lowest Credit Rating Assigned	Number of Banks Currently Performing		Deferrals / Defaults as % of Current Balance			Conditional Default Rates for 2018 and beyond			Cumulative OTTI Life to Date
TPREF Funding II	Class B Notes	$	725	$	547	$	(178	)	C		19		26	%		0.33	%	$	274