Securities (Tables)

9 Months Ended

Sep. 30, 2018

Securities [Abstract]

Amortized cost and fair value of investment securities AFS

The amortized cost and fair values of our AFS securities portfolio were as follows:

	September 30, 2018
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
	(dollars in thousands)
U.S. Treasury securities	$	1,990	$	—	$	15	$	1,975
U.S. government agency notes		10,107		—		132		9,975
	$	12,097	$	—	$	147	$	11,950

	December 31, 2017
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
	(dollars in thousands)
U.S. government agency notes	$	10,169	$	—	$	50	$	10,119
	$	10,169	$	—	$	50	$	10,119

Amortized cost and fair value of investment securities held to maturity

The amortized cost and fair values of our held-to-maturity (“HTM”) securities portfolio were as follows:

	September 30, 2018
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
	(dollars in thousands)
U.S. Treasury securities	$	3,991	$	14	$	2	$	4,003
U.S. government agency notes		12,993		10		133		12,870
Mortgage-backed securities		26,124		8		1,139		24,993
	$	43,108	$	32	$	1,274	$	41,866

	December 31, 2017
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
	(dollars in thousands)
U.S. Treasury securities	$	4,994	$	68	$	6	$	5,056
U.S. government agency notes		19,004		81		99		18,986
Mortgage-backed securities		30,305		27		370		29,962
	$	54,303	$	176	$	475	$	54,004

Schedule of AFS securities in an unrealized loss position

Gross unrealized losses and fair value by length of time that the individual AFS securities have been in an unrealized loss position at the dates indicated are presented in the following tables:

	September 30, 2018
	Less than 12 months				12 months or more				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
	(dollars in thousands)
U.S. Treasury securities	$	1,975	$	15	$	—	$	—	$	1,975	$	15
U.S. government agency notes		6,948		86		3,027		46		9,975		132
	$	8,923	$	101	$	3,027	$	46	$	11,950	$	147

	December 31, 2017
	Less than 12 months				12 months or more				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
	(dollars in thousands)
U.S. government agency notes	$	10,119	$	50	$	—	$	—	$	10,119	$	50
	$	10,119	$	50	$	—	$	—	$	10,119	$	50

Schedule of temporary impairment losses

Gross unrealized losses and fair value by length of time that the individual HTM securities have been in an unrealized loss position at the dates indicated are presented in the following tables:

	September 30, 2018
	Less than 12 months				12 months or more				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
	(dollars in thousands)
U.S. Treasury securities	$	—	$	—	$	998	$	2	$	998	$	2
U.S. government agency notes		2,978		15		7,911		118		10,889		133
Mortgage-backed securities		3,649		106		21,090		1,033		24,739		1,139
	$	6,627	$	121	$	29,999	$	1,153	$	36,626	$	1,274

	December 31, 2017
	Less than 12 months				12 months or more				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
	(dollars in thousands)
U.S. Treasury securities	$	1,993	$	6	$	—	$	—	$	1,993	$	6
U.S. government agency notes		6,977		23		6,964		76		13,941		99
Mortgage-backed securities		20,993		217		7,046		153		28,039		370
	$	29,963	$	246	$	14,010	$	229	$	43,973	$	475

Amortized cost and estimated fair value of debt securities

Contractual maturities of debt securities at September 30, 2018 are shown below. Actual maturities may differ from contractual maturities because borrowers have the right to call or prepay obligations with or without call or prepayment penalties.

	AFS Securities				HTM Securities
	Amortized		Fair		Amortized		Fair
	Cost		Value		Cost		Value
	(dollars in thousands)
Due in one year or less	$	3,000	$	2,980	$	8,004	$	7,969
Due after one through five years		9,097		8,970		8,980		8,904
Mortgage-backed securities		—		—		26,124		24,993
	$	12,097	$	11,950	$	43,108	$	41,866