Securities (Tables)

3 Months Ended

Mar. 31, 2018

Securities

Schedule of amortized cost and approximate fair values, together with gross unrealized gains and losses

	March 31, 2018
			Gross		Gross		Approximate
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
	(In thousands)
Available-for-sale securities:
Treasury notes	$	3,494	$	—	$	21	$	3,473
Federal agencies		379,719		—		2,103		377,616
Equities		69		18		—		87
Municipals		6,430		—		—		6,430
Mortgage-backed - Government-sponsored entity (GSE) - residential		25,851		—		—		25,851
Total available-for-sale securities	$	415,563	$	18	$	2,124	$	413,457

	December 31, 2017
			Gross		Gross		Approximate
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
	(In thousands)
Available-for-sale securities:
Treasury notes	$	1,000	$	—	$	8	$	992
Federal agencies		376,414		—		1,683		374,731
Municipals		6,688		—		—		6,688
Mortgage-backed - Government-sponsored entity (GSE) - residential		25,960		—		—		25,960
Total available-for-sale securities	$	410,062	$	—	$	1,691	$	408,371

Schedule of amortized cost and fair value of available-for-sale securities by contractual maturity

	March 31, 2018				December 31, 2017
	Amortized		Fair		Amortized		Fair
	Cost		Value		Cost		Value
Contractual Maturity	(In thousands)
Within one year	$	184,928	$	184,268	$	164,997	$	164,321
After one through five years		198,515		197,051		212,905		211,890
After five through ten years		—		—		—		—
After ten years		6,200		6,200		6,200		6,200
		389,643		387,519		384,102		382,411
Mortgage-backed - Government-sponsored entity (GSE) - residential		25,851		25,851		25,960		25,960
Equities		69		87		—		—
	$	415,563	$	413,457	$	410,062	$	408,371

Schedule of gross unrealized losses and fair value of investments with unrealized losses have been in continuous

	March 31, 2018
					12 Months or
	Less than 12 Months				Longer				Total
			Gross				Gross				Gross
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
	(In thousands)
Available-for-sale securities:
Treasury notes	$	—	$	—	$	3,473	$	21	$	3,473	$	21
Federal agencies		173,816		633		203,800		1,470		377,616		2,103
	$	173,816	$	633	$	207,273	$	1,491	$	381,089	$	2,124

	December 31, 2017
					12 Months or
	Less than 12 Months				Longer				Total
			Gross				Gross				Gross
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
	(In thousands)
Available-for-sale securities:
Treasury notes	$	992	$	8	$	—	$	—	$	992	$	8
Federal agencies		191,064		903		183,667		780		374,731		1,683
	$	192,056	$	911	$	183,667	$	780	$	375,723	$	1,691