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Goodwill and Other Intangible Assets
 6 Months Ended
Jun. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets Goodwill, Other Intangible Assets and Servicing Assets
The following is a summary of the gross carrying amount and accumulated amortization of amortizable intangible assets and the carrying amount of unamortized intangible assets as of the periods presented.
June 30, 2024December 31, 2023
($ in thousands)Gross Carrying
Amount		Accumulated
Amortization		Net AmountGross Carrying
Amount		Accumulated
Amortization		Net Amount
Amortizable intangible assets:
Customer lists$1,600 $1,227 $373 $2,700 $2,167 $533 
Core deposit intangibles57,890 32,187 25,703 57,890 28,933 28,957 
Other intangibles100 96 4 100 83 17 
Total amortizable intangible assets$59,590 $33,510 $26,080 $60,690 $31,183 $29,507 
Unamortizable intangible assets:
Goodwill$478,750 $478,750 
Customer lists are generally amortized over five years and core deposit intangibles are generally amortized over 10 years, both at an accelerated rate.
Amortization expense of all amortizable intangible assets totaled $1.7 million and $2.0 million for the three months ended June 30, 2024 and 2023, respectively, and $3.4 million and $4.2 million for the six months ended June 30, 2024 and 2023, respectively.
Goodwill is evaluated for impairment on at least an annual basis, with the annual evaluation occurring as of October 31 of each year. Goodwill is also evaluated for impairment any time there is a triggering event indicating that impairment may have occurred. No triggering events were identified during 2024 to date and, therefore, the Company did not perform interim impairment evaluations. The Company's most recent evaluation of goodwill, which occurred in the fourth quarter of 2023, indicated that there was no goodwill impairment. There was no change to carrying amounts of goodwill during 2024.
The following table presents the estimated amortization expense schedule related to acquisition-related amortizable intangible assets. These amounts will be recorded as "Intangibles amortization expense" within the noninterest expense section of the consolidated statements of income. These estimates are subject to change in future periods
to the extent management determines it is necessary to make adjustments to the carrying value or estimated useful lives of amortizable intangible assets.
($ in thousands)Estimated Amortization
Expense
July 1, 2024 to December 31, 2024$3,176 
20255,672 
20264,704 
20273,951 
20283,197 
Thereafter5,380 
Total$26,080 
The Company recorded SBA guaranteed servicing fee income of $0.8 million and $0.9 million for the three months ended June 30, 2024 and 2023, respectively, and $1.5 million and $1.8 million for the six months ended June 30, 2024 and 2023, respectively. There was no impairment of SBA servicing assets at June 30, 2024 and December 31, 2023 and no significant changes in fair value assumptions from year end.
The following table presents the changes in the SBA servicing assets (included in "Other assets" in the Company's consolidated balance sheet) for the three and six months ended June 30, 2024 and 2023:
Three months ended June 30,Six months ended June 30,
($ in thousands)2024202320242023
Beginning balance, net$3,137 $3,897 $3,350 $4,004 
Add: New servicing assets319 195 543 271 
Less: Amortization expense and impairment charges453 311 890 494 
Ending balance, net$3,003 $3,781 $3,003 $3,781