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Securities (Tables)
 6 Months Ended
Jun. 30, 2022
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, 2022 or December 31, 2021.
 
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
June 30, 2022
Obligations of other U.S. Government agencies and corporations$145,000 $125 $(643)$144,482 
Obligations of states and political subdivisions158,609 533 (9,390)149,752 
Residential mortgage backed securities:
Government agency mortgage backed securities993,319 334 (74,237)919,416 
Government agency collateralized mortgage obligations1,099,846 3 (119,929)979,920 
Commercial mortgage backed securities:
Government agency mortgage backed securities11,241 — (568)10,673 
Government agency collateralized mortgage obligations223,234 68 (18,222)205,080 
Other debt securities123,068 60 (4,198)118,930 
$2,754,317 $1,123 $(227,187)$2,528,253 
 
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
December 31, 2021
U.S. Treasury securities$3,007 $3 $— $3,010 
Obligations of states and political subdivisions153,847 5,532 (269)159,110 
Residential mortgage backed securities:
Government agency mortgage backed securities967,497 7,854 (6,816)968,535 
Government agency collateralized mortgage obligations1,008,514 457 (20,371)988,600 
Commercial mortgage backed securities:
Government agency mortgage backed securities14,717 365 (1)15,081 
Government agency collateralized mortgage obligations216,859 812 (3,419)214,252 
Other debt securities36,515 1,097 (148)37,464 
$2,400,956 $16,120 $(31,024)$2,386,052 
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, 2022
Obligations of states and political subdivisions$293,655 $34 $(46,717)$246,972 
Residential mortgage backed securities
Government agency mortgage backed securities89,943 — (6,544)83,399 
Government agency collateralized mortgage obligations22,360 — (3,375)18,985 
Commercial mortgage backed securities:
Government agency mortgage backed securities17,017 — (2,276)14,741 
Government agency collateralized mortgage obligations45,920 78 (3,809)42,189 
Other debt securities19,988 — (1,589)18,399 
$488,883 $112 $(64,310)$424,685 
Allowance for credit losses - held to maturity securities(32)
Held to maturity securities, net of allowance for credit losses$488,851 
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
December 31, 2021
Obligations of states and political subdivisions$267,641 $333 $(685)$267,289 
Residential mortgage backed securities
Government agency mortgage backed securities60,507 1 (198)60,310 
Government agency collateralized mortgage obligations24,832 — (92)24,740 
Commercial mortgage backed securities:
Government agency mortgage backed securities1,855 — — 1,855 
Government agency collateralized mortgage obligations39,505 — (117)39,388 
Other debt securities22,049 — (79)21,970 
$416,389 $334 $(1,171)$415,552 
Allowance for credit losses - held to maturity securities(32)
Held to maturity securities, net of allowance for credit losses$416,357 
Schedule of realized gain (loss) Securities sold during the six months ended June 30, 2021 were as set forth in the table below.
Carrying ValueNet ProceedsGain/(Loss)
Six months ended June 30, 2021
Obligations of states and political subdivisions$47 $50 $3 
Residential mortgage backed securities:
Government agency mortgage backed securities136,340 139,735 3,395 
Government agency collateralized mortgage obligations5,626 5,646 20 
Trust preferred securities12,021 9,960 (2,061)
$154,034 $155,391 $1,357 

Gross realized gains and losses on sales of securities available for sale for the six months ended June 30, 2021 were as follows:
Six Months Ended
 June 30,
 2021
Gross gains on sales of securities available for sale$3,508 
Gross losses on sales of securities available for sale(2,151)
Gains on sales of securities available for sale, net$1,357 
Amortized cost and fair value of securities by contractual maturity
The amortized cost and fair value of securities at June 30, 2022 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$150 $149 $7,177 $7,201 
Due after one year through five years1,880 1,808 197,307 196,673 
Due after five years through ten years38,077 34,127 79,275 76,807 
Due after ten years253,548 210,888 81,590 73,773 
Residential mortgage backed securities:
Government agency mortgage backed securities89,943 83,399 993,319 919,416 
Government agency collateralized mortgage obligations22,360 18,985 1,099,846 979,920 
Commercial mortgage backed securities:
Government agency mortgage backed securities17,017 14,741 11,241 10,673 
Government agency collateralized mortgage obligations45,920 42,189 223,234 205,080 
Other debt securities19,988 18,399 61,328 58,710 
$488,883 $424,685 $2,754,317 $2,528,253 
Gross unrealized losses and fair value by investment category
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, 2022
Obligations of other U.S. Government agencies and corporations3$119,357 $(643)—$— $— 3$119,357 $(643)
Obligations of states and political subdivisions6098,281 (8,807)45,615 (583)64103,896 (9,390)
Residential mortgage backed securities:
Government agency mortgage backed securities121798,188 (64,728)1079,131 (9,509)131877,319 (74,237)
Government agency collateralized mortgage obligations56811,824 (94,500)11167,946 (25,429)67979,770 (119,929)
Commercial mortgage backed securities:
Government agency mortgage backed securities310,255 (568)—— — 310,255 (568)
Government agency collateralized mortgage obligations29144,470 (12,039)839,804 (6,183)37184,274 (18,222)
Other debt securities23114,580 (4,198)—— — 23114,580 (4,198)
Total295$2,096,955 $(185,483)33$292,496 $(41,704)328$2,389,451 $(227,187)
December 31, 2021
Obligations of states and political subdivisions8$34,303 $(216)3$3,892 $(53)11$38,195 $(269)
Residential mortgage backed securities:
Government agency mortgage backed securities41727,546 (6,312)112,305 (504)42739,851 (6,816)
Government agency collateralized mortgage obligations49966,126 (20,371)—— — 49966,126 (20,371)
Commercial mortgage backed securities:
Government agency mortgage backed securities11,791 (1)1432 — 22,223 (1)
Government agency collateralized mortgage obligations21160,919 (3,072)29,005 (347)23169,924 (3,419)
Trust preferred securities—— — —— — —— — 
Other debt securities18,699 (148)—— — 18,699 (148)
Total121$1,899,384 $(30,120)7$25,634 $(904)128$1,925,018 $(31,024)
 Less than 12 Months12 Months or MoreTotal
 #Fair
Value		Unrealized
Losses		#Fair
Value		Unrealized
Losses		#Fair
Value		Unrealized
Losses
Held to Maturity:
June 30, 2022
Obligations of states and political subdivisions127$241,365 $(46,316)1$1,482 $(401)128$242,847 $(46,717)
Residential mortgage backed securities:
Government agency mortgage backed securities5377,033 (5,634)36,365 (910)5683,398 (6,544)
Government agency collateralized mortgage obligations—— — 118,985 (3,375)118,985 (3,375)
Commercial mortgage backed securities:
Government agency mortgage backed securities114,741 (2,276)—— — 114,741 (2,276)
Government agency collateralized mortgage obligations732,509 (3,307)15,044 (502)837,553 (3,809)
Other debt securities818,399 (1,589)—— — 818,399 (1,589)
Total196$384,047 $(59,122)6$31,876 $(5,188)202$415,923 $(64,310)
December 31, 2021
Obligations of states and political subdivisions24$62,131 $(685)—$— $— 24$62,131 $(685)
Residential mortgage backed securities:
Government agency mortgage backed securities5053,560 (181)15,354 (17)5158,914 (198)
Government agency collateralized mortgage obligations124,740 (92)—— — 124,740 (92)
Commercial mortgage backed securities:
Government agency collateralized mortgage obligations739,388 (117)—— — 739,388 (117)
Other debt securities821,972 (79)—— — 821,972 (79)
Total90$201,791 $(1,154)1$5,354 $(17)91$207,145 $(1,171)