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Goodwill and Other Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Assets and Goodwill
The following is a summary of the gross carrying amount and accumulated amortization of amortizable intangible assets as of March 31, 2023 and December 31, 2022, and the carrying amount of unamortized intangible assets as of those same dates.
March 31, 2023December 31, 2022
($ in thousands)Gross Carrying
Amount		Accumulated
Amortization		Gross Carrying
Amount		Accumulated
Amortization
Amortizable intangible assets:
Customer lists$2,700 1,927 2,700 1,847 
Core deposit intangibles57,890 23,334 29,050 21,274 
SBA servicing assets13,342 9,445 13,264 9,260 
Other100 64 100 58 
Total$74,032 34,770 45,114 32,439 
Unamortizable intangible assets:
Goodwill$478,750 364,263 
SBA Servicing Assets The following table presents the changes in the SBA servicing assets for the three months ended March 31, 2023 and 2022:
Three months ended March 31,
($ in thousands)20232022
Beginning balance, net$4,004 5,472 
Add: New servicing assets77 745 
Less: Amortization and impairment expense184 626 
Ending balance, net$3,897 5,591 
Schedule of the Estimated Amortization Expense
The following table presents the estimated amortization expense schedule related to acquisition-related amortizable intangible assets, excluding the SBA servicing assets. These amounts will be recorded as "Intangibles amortization expense" within the noninterest expense section of the Consolidated Statements of Income. These estimates are subject to change in future periods to the extent management determines it is necessary to make adjustments to the carrying value or estimated useful lives of amortized intangible assets.
($ in thousands)Estimated Amortization
Expense
April 1, 2023 to December 31, 2023$5,857 
20246,604 
20255,672 
20264,705 
20273,951 
Thereafter8,576 
Total$35,365 
Schedule of Goodwill
The following table presents the changes in carrying amounts of goodwill:
($ 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 March 31, 2023$478,750