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Securities (Tables)
 6 Months Ended
Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]  
Amortized cost and fair value of securities available for sale
The amortized cost and fair value of securities available for sale were as follows as of the dates presented in the tables below.

There was no allowance for credit losses allocated to any of the Company’s available for sale securities as of June 30, 2023 or December 31, 2022.
 
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
June 30, 2023
Obligations of states and political subdivisions$41,474 $16 $(3,439)$38,051 
Residential mortgage backed securities:
Government agency mortgage backed securities328,760 28 (42,751)286,037 
Government agency collateralized mortgage obligations516,474 — (101,385)415,089 
Commercial mortgage backed securities:
Government agency mortgage backed securities6,042 — (797)5,245 
Government agency collateralized mortgage obligations164,320 — (25,508)138,812 
Other debt securities73,049 316 (5,669)67,696 
$1,130,119 $360 $(179,549)$950,930 
 
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
December 31, 2022
Obligations of other U.S. Government agencies and corporations$170,000 $— $(5,340)$164,660 
Obligations of states and political subdivisions154,066 204 (9,368)144,902 
Residential mortgage backed securities:
Government agency mortgage backed securities508,415 37 (52,036)456,416 
Government agency collateralized mortgage obligations605,033 — (103,864)501,169 
Commercial mortgage backed securities:
Government agency mortgage backed securities11,166 — (1,053)10,113 
Government agency collateralized mortgage obligations211,435 — (25,589)185,846 
Other debt securities74,885 — (4,049)70,836 
$1,735,000 $241 $(201,299)$1,533,942 
The amortized cost and fair value of securities held to maturity were as follows as of the dates presented:
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
June 30, 2023
Obligations of states and political subdivisions$289,949 $23 $(42,782)$247,190 
Residential mortgage backed securities
Government agency mortgage backed securities455,199 — (25,797)429,402 
Government agency collateralized mortgage obligations405,793 — (35,372)370,421 
Commercial mortgage backed securities:
Government agency mortgage backed securities16,995 — (3,231)13,764 
Government agency collateralized mortgage obligations44,913 — (7,318)37,595 
Other debt securities60,227 — (5,058)55,169 
$1,273,076 $23 $(119,558)$1,153,541 
Allowance for credit losses - held to maturity securities(32)
Held to maturity securities, net of allowance for credit losses$1,273,044 
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
December 31, 2022
Obligations of states and political subdivisions$291,886 $17 $(48,325)$243,578 
Residential mortgage backed securities
Government agency mortgage backed securities483,560 — (24,432)459,128 
Government agency collateralized mortgage obligations423,315 — (30,706)392,609 
Commercial mortgage backed securities:
Government agency mortgage backed securities17,006 — (3,261)13,745 
Government agency collateralized mortgage obligations45,430 — (6,559)38,871 
Other debt securities62,875 — (4,266)58,609 
$1,324,072 $17 $(117,549)$1,206,540 
Allowance for credit losses - held to maturity securities(32)
Held to maturity securities, net of allowance for credit losses$1,324,040 
Amortized cost and fair value of securities by contractual maturity
The amortized cost and fair value of securities at June 30, 2023 by contractual maturity are shown below. Expected maturities will differ from contractual maturities because issuers may call or prepay obligations with or without call or prepayment penalties.
 
 Held to MaturityAvailable for Sale
 Amortized
Cost		Fair
Value		Amortized
Cost		Fair
Value
Due within one year$— $— $8,630 $8,599 
Due after one year through five years3,294 3,115 37,323 37,428 
Due after five years through ten years70,241 61,158 51,728 44,978 
Due after ten years216,413 182,917 16,769 14,671 
Residential mortgage backed securities:
Government agency mortgage backed securities455,199 429,402 328,760 286,037 
Government agency collateralized mortgage obligations405,793 370,421 516,474 415,089 
Commercial mortgage backed securities:
Government agency mortgage backed securities16,995 13,764 6,042 5,245 
Government agency collateralized mortgage obligations44,913 37,595 164,320 138,812 
Other debt securities60,228 55,169 73 71 
$1,273,076 $1,153,541 $1,130,119 $950,930 
Schedule of realized gain (loss) Securities sold were as follows for the three and six months ended June 30, 2023. There were no securities sold during the three and six months ended June 30, 2022.
Carrying ValueNet Proceeds(Loss)
Three months ended June 30, 2023
Obligations of other U.S. Government agencies and corporations$170,000 $164,915 $(5,085)
Obligations of states and political subdivisions104,950 99,439 $(5,511)
Residential mortgage backed securities:
Government agency mortgage backed securities137,196 130,602 $(6,594)
Government agency collateralized mortgage obligations54,028 51,101 (2,927)
Commercial mortgage backed securities:
Government agency mortgage backed securities5,048 4,825 (223)
Government agency collateralized mortgage obligations40,197 38,099 (2,098)
$511,419 $488,981 $(22,438)
Six months ended June 30, 2023
Obligations of other U.S. Government agencies and corporations$170,000 $164,915 $(5,085)
Obligations of states and political subdivisions104,950 99,439 (5,511)
Residential mortgage backed securities:
Government agency mortgage backed securities137,196 130,602 (6,594)
Government agency collateralized mortgage obligations54,028 51,101 (2,927)
Commercial mortgage backed securities:
Government agency mortgage backed securities5,048 4,825 (223)
Government agency collateralized mortgage obligations40,197 38,099 (2,098)
$511,419 $488,981 $(22,438)
Gross unrealized losses and fair value of available-for-sale securities
The following tables present the age of gross unrealized losses and fair value by investment category for which an allowance for credit losses has not been recorded as of the dates presented:
 
 Less than 12 Months12 Months or MoreTotal
 #Fair
Value		Unrealized
Losses		#Fair
Value		Unrealized
Losses		#Fair
Value		Unrealized
Losses
Available for Sale:
June 30, 2023
Obligations of states and political subdivisions107,827 (35)1023,073 (3,404)2030,900 (3,439)
Residential mortgage backed securities:
Government agency mortgage backed securities46,673 (368)46275,823 (42,383)50282,496 (42,751)
Government agency collateralized mortgage obligations0— — 41415,090 (101,385)41415,090 (101,385)
Commercial mortgage backed securities:
Government agency mortgage backed securities—— — 25,245 (797)25,245 (797)
Government agency collateralized mortgage obligations11,131 (38)26137,681 (25,470)27138,812 (25,508)
Other debt securities35,492 (800)1832,171 (4,869)2137,663 (5,669)
Total18$21,123 $(1,241)143$889,083 $(178,308)161$910,206 $(179,549)
December 31, 2022
Obligations of other U.S. Government agencies and corporations5$164,660 $(5,340)—$— $— 5$164,660 $(5,340)
Obligations of states and political subdivisions84$96,939 $(4,869)11$33,038 $(4,499)95$129,977 $(9,368)
Residential mortgage backed securities:
Government agency mortgage backed securities97214,516 (15,115)29237,970 (36,921)126452,486 (52,036)
Government agency collateralized mortgage obligations16109,753 (8,552)36391,416 (95,312)52501,169 (103,864)
Commercial mortgage backed securities:
Government agency mortgage backed securities410,114 (1,053)—— — 410,114 (1,053)
Government agency collateralized mortgage obligations1667,026 (3,828)21118,821 (21,760)37185,847 (25,588)
Other debt securities2563,423 (3,167)17,412 (883)2670,835 (4,050)
Total247$726,431 $(41,924)98$788,657 $(159,375)345$1,515,088 $(201,299)
Gross unrealized losses and fair value of held-to-maturity securities
 Less than 12 Months12 Months or MoreTotal
 #Fair
Value		Unrealized
Losses		#Fair
Value		Unrealized
Losses		#Fair
Value		Unrealized
Losses
Held to Maturity:
June 30, 2023
Obligations of states and political subdivisions126$242,673 $(42,767)1$426 $(15)127$243,099 $(42,782)
Residential mortgage backed securities:
Government agency mortgage backed securities239,028 (1,387)68395,220 (24,410)70434,248 (25,797)
Government agency collateralized mortgage obligations126,396 (1,278)17344,025 (34,094)18370,421 (35,372)
Commercial mortgage backed securities:
Government agency mortgage backed securities—— — 113,764 (3,231)113,764 (3,231)
Government agency collateralized mortgage obligations14,290 (298)833,305 (7,020)937,595 (7,318)
Other debt securities—— — 1050,323 (5,058)1050,323 (5,058)
Total130$312,387 $(45,730)105$837,063 $(73,828)235$1,149,450 $(119,558)
December 31, 2022
Obligations of states and political subdivisions105$191,442 $(35,871)24$49,697 $(12,454)129$241,139 $(48,325)
Residential mortgage backed securities:
Government agency mortgage backed securities894,258 (4,186)62364,870 (20,246)70459,128 (24,432)
Government agency collateralized mortgage obligations498,912 (5,479)14293,698 (25,227)18392,610 (30,706)
Commercial mortgage backed securities:
Government agency mortgage backed securities113,745 (3,261)—— — 113,745 (3,261)
Government agency collateralized mortgage obligations27,651 (626)731,220 (5,933)938,871 (6,559)
Other debt securities242,567 (2,013)816,042 (2,253)1058,609 (4,266)
Total122$448,575 $(51,436)115$755,527 $(66,113)237$1,204,102 $(117,549)