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Securities
 6 Months Ended
Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]  
Securities Securities
The amortized cost, gross unrealized gains and losses, and fair values of available-for-sale and held-to-maturity debt securities by type follows as of:
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
 Fair
 Value
June 30, 2023
Available-for-sale:
U.S. treasury$61,989 $— $(5,120)$56,869 
U.S. agency2,264 — (36)2,228 
Obligations of states and political subdivisions29,973 — (4,237)25,736 
Mortgage backed - residential122,828 1 (15,593)107,236 
Collateralized mortgage obligations215,095 — (22,524)192,571 
Mortgage backed - commercial131,860 — (15,597)116,263 
Other debt16,783 — (1,730)15,053 
Total available-for-sale$580,792 $1 $(64,837)$515,956 
Held-to-maturity:
Obligations of states and political subdivisions$25,459 $1 $(4,099)$21,361 
Mortgage backed - residential8,116 2 (656)7,462 
Collateralized mortgage obligations4,308 — (304)4,004 
Total held-to-maturity$37,883 $3 $(5,059)$32,827 
December 31, 2022
Available-for-sale:
U.S. treasury$62,010 $— $(5,361)$56,649 
U.S. agency2,881 — (47)2,834 
Obligations of states and political subdivisions29,897 — (4,998)24,899 
Mortgage backed - residential129,955 6 (13,826)116,135 
Collateralized mortgage obligations225,559 — (21,294)204,265 
Mortgage backed - commercial130,997 — (13,661)117,336 
Other debt16,774 — (1,919)14,855 
Total available-for-sale$598,073 $6 $(61,106)$536,973 
Held-to-maturity:
Obligations of states and political subdivisions$25,378 $5 $(4,891)$20,492 
Mortgage backed - residential8,705 4 (511)8,198 
Collateralized mortgage obligations4,818 — (290)4,528 
Total held-to-maturity$38,901 $9 $(5,692)$33,218 
There was no allowance for credit losses related to our investment securities as of June 30, 2023.
As of June 30, 2023 and December 31, 2022, there were no holdings of securities of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of stockholders’ equity.
Fair value and unrealized losses on debt securities by type and length of time in a continuous unrealized loss position without an allowance for credit losses were as follows:
Less than 12 months12 months or longerTotal
Estimated
Fair
Value		Unrealized
Losses		Estimated
Fair
Value		Unrealized
Losses		Estimated
Fair
Value		Unrealized
Losses		Number
of
Securities
June 30, 2023
Available-for-sale:
U.S. treasury$— $— $56,869 $(5,120)$56,869 $(5,120)10 
U.S. agency— — 2,228 (36)2,228 (36)7 
Obligations of states and political subdivisions— — 25,267 (4,237)25,267 (4,237)18 
Mortgage backed - residential1,291 (100)105,607 (15,493)106,898 (15,593)85 
Collateralized mortgage obligations16,293 (1,007)176,278 (21,517)192,571 (22,524)66 
Mortgage backed - commercial1,742 (15)114,521 (15,582)116,263 (15,597)23 
Other debt— — 15,053 (1,730)15,053 (1,730)9 
Total available-for-sale$19,326 $(1,122)$495,823 $(63,715)$515,149 $(64,837)218 
Held-to-maturity:
Obligations of states and political subdivisions$— $— $21,026 $(4,099)$21,026 $(4,099)8
Mortgage backed - residential— — 7,291 (656)7,291 (656)10
Collateralized mortgage obligations— — 4,004 (304)4,004 (304)5
Total held-to-maturity$— $— $32,321 $(5,059)$32,321 $(5,059)23
Less than 12 months12 months or longerTotal
Estimated
Fair
Value		Unrealized
Losses		Estimated
Fair
Value		Unrealized
Losses		Estimated
Fair
Value		Unrealized
Losses		Number
of
Securities
December 31, 2022
Available-for-sale:
U.S. treasury$25,702 $(967)$30,947 $(4,394)$56,649 $(5,361)10 
U.S. agency— — 2,834 (47)2,834 (47)7 
Obligations of states and political subdivisions21,676 (3,784)2,753 (1,214)24,429 (4,998)18 
Mortgage backed - residential51,921 (2,939)63,691 (10,887)115,612 (13,826)87 
Collateralized mortgage obligations111,360 (4,631)92,905 (16,663)204,265 (21,294)66 
Mortgage backed - commercial70,710 (6,475)46,626 (7,186)117,336 (13,661)22 
Other debt14,855 (1,919)— — 14,855 (1,919)9 
Total available-for-sale$296,224 $(20,715)$239,756 $(40,391)$535,980 $(61,106)219 
Held-to-maturity:
Obligations of states and political subdivisions$20,153 $(4,891)$— $— $20,153 $(4,891)8
Mortgage backed - residential7,993 (511)— — 7,993 (511)10
Collateralized mortgage obligations4,127 (275)401 (15)4,528 (290)5
Total held-to-maturity$32,273 $(5,677)$401 $(15)$32,674 $(5,692)23
We do not consider the unrealized losses to be credit-related, as these unrealized losses primarily relate to changes in interest rates and market spreads subsequent to purchase. We do not have plans to sell any of the available-for-sale debt securities with unrealized losses as of June 30, 2023, and we believe it is more likely than not that we would not be required to sell such available-for-sale debt securities before recovery of their amortized cost.
We continue to monitor unrealized loss positions for potential credit impairments. During the six months ended June 30, 2023, there were no credit impairments related to our investment securities.
The amortized cost and fair value of our debt securities by contractual maturity as of June 30, 2023 are summarized in the following table. Maturities are based on the final contractual payment dates and do not reflect the impact of prepayments or earlier redemptions that may occur.
Amortized
Cost		Estimated
Fair
Value
Available-for-sale:
Due within 1 year$18,497 $18,107 
Due after 1 year through 5 years42,198 39,135 
Due after 5 years through 10 years163,870 145,002 
Due after 10 years356,227 313,712 
Total available-for-sale$580,792 $515,956 
Held-to-maturity:
Due after 1 year through 5 years$1,066 $1,028 
Due after 5 years through 10 years778 744 
Due after 10 years36,039 31,055 
Total held-to-maturity$37,883 $32,827 
Securities with a carrying value of $380,093 and $428,721 were pledged to secure public deposits, securities sold under agreements to repurchase and borrowed funds at June 30, 2023 and December 31, 2022, respectively.
There were no proceeds from sales and calls of securities for the three and six months ended June 30, 2023. There were proceeds from sales and calls of securities for the three and six months ended June 30, 2022 of $81,016. No gain or loss was recognized for the three and six months ended June 30, 2022 as the securities sold were acquired at fair value on April 1, 2022 in the Pioneer merger and were sold on April 5, 2022.