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Goodwill and Other Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Assets and Goodwill
The following is a summary of the gross carrying amount, accumulated amortization and net amount of amortizable intangible assets as of September 30, 2023 and December 31, 2022, and the carrying amount of unamortized intangible assets as of those same dates.
September 30, 2023December 31, 2022
($ in thousands)Gross Carrying
Amount		Accumulated
Amortization		Net AmountGross Carrying
Amount		Accumulated
Amortization		Net Amount
Amortizable intangible assets:
Customer lists$2,700 2,087 613 2,700 1,847 853 
Core deposit intangibles57,890 27,162 30,728 29,050 21,274 7,776 
Other intangibles100 77 23 100 58 42 
Intangibles before servicing assets60,690 29,326 31,364 31,850 23,179 8,671 
SBA servicing assets13,728 10,213 3,515 13,264 9,260 4,004 
Total amortizable intangible assets$74,418 39,539 34,879 45,114 32,439 12,675 
Unamortizable intangible assets:
Goodwill$478,750 364,263 
SBA Servicing Assets
The following table presents the changes in the SBA servicing assets and SBA servicing income for the three and nine months ended September 30, 2023 and 2022:
Three months ended September 30,Nine months ended September 30,
($ in thousands)2023202220232022
Beginning balance, net$3,781 4,967 4,004 5,472 
Add: New servicing assets191 131 464 1,158 
Less: Amortization and impairment expense457 707 953 2,239 
Ending balance, net$3,515 4,391 3,515 4,391 
SBA guaranteed servicing income$846 1,120 2,693 2,901 
Schedule of Goodwill
The following table presents the changes in carrying amounts of goodwill:
($ in thousands)Total Goodwill
Balance at December 31, 2021$364,263 
Net activity during 2022 — 
Balance at December 31, 2022364,263 
Additions from acquisition of GrandSouth114,487 
Balance at September 30, 2023$478,750 
Schedule of the Estimated Amortization Expense
The following table presents the estimated amortization expense schedule related to acquisition-related amortizable intangible assets, excluding the SBA servicing assets. These amounts will be recorded as "Intangibles amortization expense" within the noninterest expense section of the Consolidated Statements of Income. These estimates are subject to change in future periods to the extent management determines it is necessary to make adjustments to the carrying value or estimated useful lives of amortized intangible assets.
($ in thousands)Estimated Amortization
Expense
October 1, 2023 to December 31, 2023$1,856 
20246,604 
20255,672 
20264,705 
20273,951 
Thereafter8,576 
Total$31,364