Securities (Tables)

9 Months Ended

Sep. 30, 2018

Securities

Summary of amortized cost and fair value of available-for-sale investment securities portfolios and corresponding amounts of unrealized gains and losses

			Gross		Gross
			Unrealized		Unrealized
	Amortized Cost		Gains		Losses		Fair Value
	(In thousands)
September 30, 2018:
Federal agency mortgage-backed securities	$	10,158	$	94	$	(260)	$	9,992
Federal agency debt		5,427		—		(176)		5,251
Total available-for-sale securities	$	15,585	$	94	$	(436)	$	15,243
December 31, 2017:
Federal agency mortgage-backed securities	$	11,877	$	168	$	(37)	$	12,008
Federal agency debt		5,495		2		(11)		5,486
Total available-for-sale securities	$	17,372	$	170	$	(48)	$	17,494

Summary of securities in unrealized loss positions

	Less than 12 months				12 months or more				Total
			Gross				Gross		Estimated		Gross
	Estimated		Unrealized		Estimated		Unrealized		Fair		Unrealized
	Fair Value		Losses		Fair Value		Losses		Value		Losses
	(In thousands)
September 30, 2018:
Federal agency mortgage-backed securities	$	6,078	$	(185)	$	1,621	$	(76)	$	7,699	$	(261)
Federal agency debt		5,252		(175)		—		—		5,252		(175)
Total temporarily impaired	$	11,330	$	(360)	$	1,621	$	(76)	$	12,951	$	(436)
December 31, 2017:
Federal agency mortgage-backed securities	$	4,130	$	(20)	$	812	$	(17)	$	4,942	$	(37)
Federal agency debt		3,510		(11)		—		—		3,510		(11)
Total temporarily impaired	$	7,640	$	(31)	$	812	$	(17)	$	8,452	$	(48)