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SECURITIES (Tables)
 6 Months Ended
Jun. 30, 2022
SECURITIES  
Schedule of amortized costs, gross unrealized gains and losses, and estimated fair values
The following table summarizes the amortized cost, gross unrealized gains and losses, and estimated fair values of securities available-for-sale (“AFS”) and securities held-to-maturity at June 30, 2022 and December 31, 2021.
($ in thousands)June 30, 2022
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair
Value
Available-for-sale securities:
U.S. Treasury$135,820 $— $8,979 $126,841 
Obligations of U.S. government agencies and sponsored entities172,020 16 13,375 158,660 
Tax-exempt and taxable obligations of states and municipal subdivisions671,353 1,126 80,661 591,818 
Mortgage-backed securities - residential368,957 71 29,201 339,827 
Mortgage-backed securities - commercial251,865 118 17,176 234,807 
Corporate obligations38,326 83 1,115 37,294 
Total available-for-sale$1,638,341 $1,413 $150,507 $1,489,247 
Held-to-maturity:
U.S. Treasury$109,527 $— $3,403 $106,124 
Obligations of U.S. government agencies and sponsored entities33,127 — 489 32,638 
Tax-exempt and taxable obligations of states and municipal subdivisions146,958 162 11,576 135,544 
Mortgage-backed securities - residential163,453 — 10,139 153,314 
Mortgage-backed securities - commercial130,089 66 5,793 124,362 
Corporate obligations10,000 — 649 9,351 
Total held-to-maturity$593,154 $228 $32,049 $561,333 
($ in thousands)December 31, 2021
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair
Value
Available-for-sale securities:
U.S. Treasury$135,889 $83 $814 $135,158 
Obligations of U.S. government agencies sponsored entities182,877 1,238 1,094 183,021 
Tax-exempt and taxable obligations of states and municipal subdivisions698,861 12,452 2,811 708,502 
Mortgage-backed securities - residential410,269 4,123 3,425 410,967 
Mortgage-backed securities - commercial277,353 2,917 2,939 277,331 
Corporate obligations35,904 962 13 36,853 
Total available-for-sale$1,741,153 $21,775 $11,096 $1,751,832 
Schedule of credit quality debt securities held-to-maturity The following table summarizes the amortized cost of debt securities held-to-maturity at June 30, 2022, aggregated by credit quality indicators.
($ in thousands)June 30, 2022
A2$1,419 
Aa1/Aa2/Aa319,711 
Aaa446,055 
Not rated125,969 
Total$593,154 
Schedule of amortized cost and fair value of debt securities by contractual maturity
($ in thousands)June 30, 2022
Amortized
Cost		Fair
Value
Available-for-sale:
Due less than one year$27,963 $27,852 
Due after one year through five years269,064 257,549 
Due after five years through ten years387,471 350,647 
Due greater than ten years333,021 278,565 
Mortgage-backed securities - residential368,957 339,827 
Mortgage-backed securities - commercial251,865 234,807 
Total$1,638,341 $1,489,247 
Held-to-maturity:
Due less than one year$20,798 $20,545 
Due after one year through five years109,904 106,351 
Due after five years through ten years35,543 33,601 
Due greater than ten years133,367 123,160 
Mortgage-backed securities - residential163,453 153,314 
Mortgage-backed securities - commercial130,089 124,362 
Total$593,154 $561,333 
Schedule of securities classified as available-for-sale and held-to-maturity with unrealized losses
The following table summarizes securities in an unrealized loss position for which an allowance for credit losses has not been recorded at June 30, 2022 and December 31, 2021. There were no held-to-maturity securities at December 31, 2021. The securities are aggregated by major security type and length of time in a continuous unrealized loss position:
($ in thousands)June 30, 2022
Losses < 12 MonthsLosses 12 Months or >Total
Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses
Available-for-sale:
U.S. Treasury$124,260 $8,794 $2,582 $185 $126,842 $8,979 
Obligations of U.S. government agencies and sponsored entities152,689 12,837 4,503 538 157,192 13,375 
Tax-exempt and taxable obligations of state and municipal subdivisions477,118 70,673 58,393 9,988 535,511 80,661 
Mortgage-backed securities - residential299,279 24,606 31,500 4,595 330,779 29,201 
Mortgage-backed securities - commercial182,312 13,954 30,647 3,222 212,959 17,176 
Corporate obligations27,684 1,111 27 4 27,711 1,115 
Total$1,263,342 $131,975 $127,652 $18,532 $1,390,994 $150,507 
Held-to-maturity:
U.S. Treasury$106,124 $3,403 $— $— $106,124 $3,403 
Obligations of U.S. government agencies and sponsored entities32,638 489 — — 32,638 489 
Tax-exempt and taxable obligations of state and municipal subdivisions 86,881 11,576 — — 86,881 11,576 
Mortgage-backed securities - residential153,314 10,139 — — 153,314 10,139 
Mortgage-backed securities - commercial119,649 5,793 — — 119,649 5,793 
Corporate obligations9,351 649 — — 9,351 649 
Total$507,957 $32,049 $— $— $507,957 $32,049 
($ in thousands)December 31, 2021
Losses < 12 MonthsLosses 12 Months or >Total
Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses		Fair
Value		Gross
Unrealized
Losses
U.S. Treasury$130,098 $814 $— $— $130,098 $814 
Obligations of U.S. government agencies and sponsored entities121,402 933 5,254 161 126,656 1,094 
Tax-exempt and taxable obligations of state and municipal subdivisions249,430 2,692 3,692 119 253,122 2,811 
Mortgage-backed securities - residential284,183 3,228 8,912 197 293,095 3,425 
Mortgage-backed securities - commercial174,697 2,836 3,038 103 177,735 2,939 
Corporate obligations6,692 8 42 5 6,734 13 
Total$966,502 $10,511 $20,938 $585 $987,440 $11,096