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SECURITIES (Tables)
 9 Months Ended
Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]  
Summary of amortized cost of securities available for sale and their estimated fair value
The amortized cost of securities available for sale and their estimated fair values at September 30, 2021 and December 31, 2020 are as follows:

Amortized
Cost
Gross Unrealized Gains
Gross Unrealized Losses
Estimated
Fair
Value
(In thousands)
September 30, 2021
Available for sale
U.S. Treasury Note$6,901 $— $(128)$6,773 
Corporate Bonds86,169 2,038 (89)88,118 
U.S. Government agency obligations25,311 73 (144)25,240 
Obligations issued by U.S. states and their political
   subdivisions
21,106 1,161 (3)22,264 
Mortgage-backed securities:
Residential one-to-four family
123,930 237 (1,364)122,803 
Multifamily
41,497 790 (73)42,214 
Asset-backed securities6,769 11 (46)6,734 
Total available-for-sale$311,683 $4,310 $(1,847)$314,146 
    
December 31, 2020
Available for sale
U.S. Treasury Note$9,989 $11 $— $10,000 
Corporate Bonds57,478 1,863 — 59,341 
U.S. Government agency obligations19,787 89 (201)19,675 
Obligations issued by U.S. states and their political
   subdivisions
23,280 1,515 — 24,795 
Mortgage-backed securities:
Residential one-to-four family
71,773 951 (8)72,716 
Multifamily
56,563 1,499 (2)58,060 
Total available-for-sale$238,870 $5,928 $(211)$244,587 
Summary of amortized cost of securities held to maturity and their estimated fair value
The amortized cost of securities held-to-maturity and their estimated fair values at September 30, 2021 and December 31, 2020, are as follows:
Amortized Cost
Gross Unrecognized Gains
Gross Unrecognized Losses
Estimated
Fair
Value
(In thousands)
September 30, 2021
Held-to-maturity
Collateralized loan obligation$3,000 $— $— $3,000 
     Asset-backed securities15,325 — (186)15,139 
     Corporate bonds5,000 8 — 5,008 
Total held-to-maturity$23,325 $8 $(186)$23,147 
Amortized Cost
Gross Unrecognized Gains
Gross Unrecognized Losses
Estimated
Fair
Value
(In thousands)
December 31, 2020
Held-to-maturity
Collateralized loan obligation$7,005 $— $(26)$6,979 
Total Held-to-maturity$7,005 $— $(26)$6,979 
Summary of amortized cost and fair value of debt securities shown by contractual maturity
The amortized cost and fair value of debt securities are shown below by contractual maturity. Expected maturities on mortgage-backed securities may differ from contractual maturities as borrowers may have the right to call or prepay obligations with or without penalties. Securities not due at a single maturity are shown separately:
September 30, 2021
Amortized CostEstimated Fair Value
(In thousands)
Available-for-sale
Due in one year or less$11,257 $11,388 
Due from one year to five years91,243 93,410 
Due from five to ten years38,783 39,422 
Due after ten years4,973 4,909 
Mortgage-backed securities165,427 165,017 
Total$311,683 $314,146 
Held-to-maturity
Due in one year or less$3,000 $3,000 
  Due from one year to five years11,084 11,067 
  Due from five to ten years 9,241 9,080 
Total$23,325 $23,147 
Summary of available-for-sale securities with unrealized losses
The following tables summarize available-for-sale securities with unrealized losses at September 30, 2021 and December 31, 2020, aggregated by major security type and length of time in a continuous loss position.

Less than 12 Months12 Months or MoreTotal
Unrealized Losses
Estimated
Fair Value
Unrealized Losses
Estimated
Fair Value
Unrealized Losses
Estimated
Fair Value
(In thousands)
September 30, 2021
Available for sale
U.S. Treasury Note$(128)$6,773 $— $— $(128)$6,773 
Corporate Bonds(89)17,415 — — (89)17,415 
U.S. Government
   agency obligations		— — (144)8,680 (144)8,680 
Obligations issued by
   U.S. states and their
   political subdivisions		(3)1,851 — — (3)1,851 
Mortgage-backed
   securities:
Residential one-to-four
    family		(1,364)106,396 — — (1,364)106,396 
Multifamily(73)916 — 186 (73)1,102 
Asset-backed securities(46)1,713 — — (46)1,713 
Total available-for-sale$(1,703)$135,064 $(144)$8,866 $(1,847)$143,930 
December 31, 2020
Available for sale
U.S. Treasury Note$— $— $— $— $— $— 
Corporate Bonds— — — — — — 
U.S. Government
   agency obligations		(54)3,559 (147)10,014 (201)13,573 
Obligations issued by
   U.S. states and their
   political subdivisions		— — — — — — 
Mortgage-backed
   securities:
Residential one-to-four
    family		(7)3,228 (1)115 (8)3,343 
Multifamily(2)738 — 313 (2)1,051 
Total available-for-sale$(63)$7,525 $(148)$10,442 $(211)$17,967