Debt Securities Held to Maturity (Tables)

6 Months Ended

Jun. 30, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of amortized cost, gross unrealized gains, gross unrealized losses and the fair value of securities held-to-maturity

Debt securities held to maturity at June 30, 2022 and December 31, 2021 are summarized as follows:

	June 30, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Allowance for Credit Losses		Fair Value
	(In thousands)
U.S. government and agency obligations	$	44,870	$	—	$	(5,528)	$	—	$	39,342
Mortgage-backed securities and collateralized mortgage obligations	381,014		—		(27,331)		—		353,683
	$	425,884	$	—	$	(32,859)	$	—	$	393,025

7.    Debt Securities Held to Maturity (continued)

	December 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	44,870	$	—	$	(759)	$	44,111
Mortgage-backed securities and collateralized mortgage obligations	384,864		6,741		(927)		390,678
	$	429,734	$	6,741	$	(1,686)	$	434,789

Schedule of securities by contractual maturity

The amortized cost and fair value of debt securities available for sale at June 30, 2022, by contractual final maturity, is shown below. Expected maturities may differ from contractual maturities due to prepayment or early call options exercised by the issuer.

	June 30, 2022
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	915	$	914
More than one year to five years	56,479		54,788
More than five years to ten years	105,603		99,593
	$	162,997	$	155,295
Mortgage-backed securities and collateralized mortgage obligations	1,452,210		1,335,347
	$	1,615,207	$	1,490,642

The amortized cost and fair value of debt securities held to maturity at June 30, 2022, by contractual final maturity, is shown below. Expected maturities may differ from contractual maturities due to prepayment or early call options exercised by the issuer.

	June 30, 2022
	Amortized Cost		Fair Value
	(In thousands)
More than one year to five years	$	14,874	$	13,656
More than five years to ten years	19,996		17,590
More than ten years	10,000		8,096
	44,870		39,342
Mortgage-backed securities and collateralized mortgage obligations	381,014		353,683
	$	425,884	$	393,025

Schedule of held-to-maturity securities reported in a continuous unrealized loss position

The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at June 30, 2022 and December 31, 2021 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	June 30, 2022
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
U.S. government and agency obligations	$	21,752	$	(3,122)	$	17,590	$	(2,406)	$	39,342	$	(5,528)
Mortgage-backed securities and collateralized mortgage obligations	337,750		(24,639)		15,849		(2,692)		353,599		(27,331)
	$	359,502	$	(27,761)	$	33,439	$	(5,098)	$	392,941	$	(32,859)

	December 31, 2021
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
U.S. government and agency obligations	$	44,111	$	(759)	$	—	$	—	$	44,111	$	(759)
Mortgage-backed securities and collateralized mortgage obligations	79,036		(927)		—		—		79,036		(927)
	$	123,147	$	(1,686)	$	—	$	—	$	123,147	$	(1,686)