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SECURITIES AVAILABLE FOR SALE, HELD TO MATURITY, AND EQUITY SECURITIES (Tables)
3 Months Ended
Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
Schedule of Securities Available for Sale, Held to Maturity, and Marketable Equity Securities
The following is a summary of securities available for sale, held to maturity, and marketable equity securities:
(In thousands)Amortized  CostGross
Unrealized
Gains
Gross
Unrealized
Losses
Fair ValueAllowance
March 31, 2023    
Securities available for sale    
U.S Treasuries$8,981 $— $— $8,981 
Municipal bonds and obligations
65,849 749 (1,981)64,617 — 
Agency collateralized mortgage obligations 612,727 — (86,778)525,949 — 
Agency mortgage-backed securities
628,243 (88,647)539,597 — 
Agency commercial mortgage-backed securities
261,167 — (33,759)227,408 — 
Corporate bonds
43,349 66 (3,352)40,063 — 
Other bonds and obligations
655 67 (66)656 — 
Total securities available for sale1,620,971 883 (214,583)1,407,271 — 
Securities held to maturity    
Municipal bonds and obligations
263,818 1,174 (19,260)245,732 49 
Agency collateralized mortgage obligations 124,335 — (18,041)106,294 — 
Agency mortgage-backed securities
50,152 — (8,511)41,641 — 
Agency commercial mortgage-backed securities
134,180 — (22,781)111,399 — 
Tax advantaged economic development bonds
1,830 (103)1,734 22 
Other bonds and obligations
291 — — 291 — 
Total securities held to maturity574,606 1,181 (68,696)507,091 71 
Marketable equity securities15,036 — (1,964)13,072 — 
Total$2,210,613 $2,064 $(285,243)$1,927,434 $71 
(In thousands)Amortized  CostGross
Unrealized
Gains
Gross
Unrealized
Losses
Fair ValueAllowance
December 31, 2022    
Securities available for sale    
U.S Treasuries$11,972 $$— $11,973 $— 
Municipal bonds and obligations
65,943 422 (3,030)63,335 — 
Agency collateralized mortgage obligations 631,732 — (99,787)531,945 — 
Agency mortgage-backed securities
643,308 (96,996)546,313 — 
Agency commercial mortgage-backed securities
264,218 — (35,750)228,468 — 
Corporate bonds
43,368 80 (2,938)40,510 — 
Other bonds and obligations
655 67 (66)656 — 
Total securities available for sale1,661,196 571 (238,567)1,423,200 — 
Securities held to maturity    
Municipal bonds and obligations
266,793 691 (23,704)243,780 66 
Agency collateralized mortgage obligations 128,136 — (20,420)107,716 — 
Agency mortgage-backed securities
50,958 — (9,240)41,718 — 
Agency commercial mortgage-backed securities
135,206 — (23,203)112,003 — 
Tax advantaged economic development bonds
2,069 (121)1,956 25 
Other bonds and obligations
291 — — 291 — 
Total securities held to maturity583,453 699 (76,688)507,464 91 
Marketable equity securities15,035 — (2,179)12,856 — 
Total$2,259,684 $1,270 $(317,434)$1,943,520 $91 
Schedule of Debt Securities, Held-to-maturity, Allowance for Credit Loss
The following table summarizes the activity in the allowance for credit losses for debt securities held to maturity by security type for the three months ended March 31, 2023 and 2022:
(In thousands)Municipal bonds and obligationsTax advantaged economic development bondsTotal
Balance at December 31, 2022$66 $25 $91 
(Benefit)/provision for credit losses(17)(3)(20)
Balance at March 31, 2023$49 $22 $71 
(In thousands)Municipal bonds and obligationsTax advantaged economic development bondsTotal
Balance at December 31, 2021$70 $35 $105 
(Benefit)/provision for credit losses(3)(3)(6)
Balance at March 31, 2022$67 $32 $99 
Schedule of Amortized Cost and Estimated Fair Value of Available for Sale (AFS) and Held to Maturity (HTM) Securities, Segregated by Contractual Maturity
The amortized cost and estimated fair value of available for sale (“AFS”) and held to maturity (“HTM”) securities segregated by contractual maturity at March 31, 2023 are presented below. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations. Mortgage-backed securities are shown in total, as their maturities are highly variable.
 Available for saleHeld to maturity
 AmortizedFairAmortizedFair
(In thousands)CostValueCostValue
Within 1 year$9,800 $9,801 $802 $803 
Over 1 year to 5 years10,863 10,694 2,222 2,218 
Over 5 years to 10 years52,127 49,259 34,563 34,659 
Over 10 years46,044 44,563 228,352 210,077 
Total bonds and obligations118,834 114,317 265,939 247,757 
Mortgage-backed securities1,502,137 1,292,954 308,667 259,334 
Total$1,620,971 $1,407,271 $574,606 $507,091 
Schedule of Securities with Unrealized Losses, Segregated by the Duration of their Continuous Unrealized Loss Positions
Securities available for sale and held to maturity with unrealized losses, segregated by the duration of their continuous unrealized loss positions, are summarized as follows:
 Less Than Twelve MonthsOver Twelve MonthsTotal
 Gross Gross Gross 
 UnrealizedFairUnrealizedFairUnrealizedFair
(In thousands)LossesValueLossesValueLossesValue
March 31, 2023      
Securities available for sale      
Municipal bonds and obligations
$356 $13,295 $1,625 $15,813 $1,981 $29,108 
Agency collateralized mortgage obligations
250 9,999 86,528 515,950 86,778 525,949 
Agency mortgage-backed securities
142 4,110 88,505 535,398 88,647 539,508 
Agency commercial mortgage-backed securities911 10,783 32,848 216,624 33,759 227,407 
Corporate bonds
1,301 24,063 2,051 15,089 3,352 39,152 
Other bonds and obligations
— — 66 295 66 295 
Total securities available for sale$2,960 $62,250 $211,623 $1,299,169 $214,583 $1,361,419 
Securities held to maturity      
Municipal bonds and obligations$633 $46,988 $18,627 $78,012 $19,260 $125,000 
Agency collateralized mortgage obligations1,065 37,271 16,976 69,023 18,041 106,294 
Agency mortgage-backed securities— — 8,511 41,641 8,511 41,641 
Agency commercial mortgage-backed securities— — 22,781 111,399 22,781 111,399 
Tax advantaged economic development bonds
— — 103 989 103 989 
Total securities held to maturity1,698 84,259 66,998 301,064 68,696 385,323 
Total$4,658 $146,509 $278,621 $1,600,233 $283,279 $1,746,742 
December 31, 2022      
Securities available for sale      
Municipal bonds and obligations
$2,406 $36,696 $624 $2,763 $3,030 $39,459 
Agency collateralized mortgage obligations
23,052 247,509 76,735 284,434 99,787 531,943 
Agency mortgage-backed securities
3,124 37,540 93,872 508,683 96,996 546,223 
Agency commercial mortgage-backed securities9,885 96,396 25,865 132,043 35,750 228,439 
Corporate bonds
1,709 25,657 1,229 9,929 2,938 35,586 
Other bonds and obligations
— — 66 295 66 295 
Total securities available for sale$40,176 $443,798 $198,391 $938,147 $238,567 $1,381,945 
Securities held to maturity      
Municipal bonds and obligations
$5,476 $125,494 $18,228 $38,341 $23,704 $163,835 
Agency collateralized mortgage obligations
2,734 49,539 17,686 58,177 20,420 107,716 
Agency mortgage-backed securities
300 2,419 8,940 39,299 9,240 41,718 
Agency commercial mortgage-backed securities
447 9,713 22,756 102,290 23,203 112,003 
Tax advantaged economic development bonds
142 120 1,008 121 1,150 
Total securities held to maturity8,958 187,307 67,730 239,115 76,688 426,422 
Total$49,134 $631,105 $266,121 $1,177,262 $315,255 $1,808,367