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Goodwill and Other Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2021
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 June 30, 2021 and December 31, 2020, and the carrying amount of unamortized intangible assets as of those same dates.
June 30, 2021December 31, 2020
($ in thousands)Gross Carrying
Amount		Accumulated
Amortization		Gross Carrying
Amount		Accumulated
Amortization
Amortizable intangible assets:
Customer lists$2,700 1,141 7,613 2,814 
Core deposit intangibles28,440 25,115 28,440 23,832 
SBA servicing asset11,291 5,202 9,976 4,188 
Other1,040 951 1,403 1,232 
Total$43,471 32,409 47,432 32,066 
Unamortizable intangible assets:
Goodwill$231,906 239,272 
Schedule of the estimated amortization expense for the five succeeding fiscal years The following table presents the estimated amortization expense schedule related to acquisition-related amortizable intangible assets. These amounts will be recorded as "Intangibles amortization expense" within the noninterest expense section of the Consolidated Statements of Income. These estimates are subject to change in future periods to the extent management determines it is necessary to make adjustments to the carrying value or
estimated useful lives of amortized intangible assets. income within the line item "Other service charges, commissions and fees" of the Consolidated Statements of Income.
($ in thousands)Estimated Amortization
Expense
July 1, 2021 to December 31, 2021$1,337 
20221,994 
20231,037 
2024392 
2025213 
Thereafter— 
Total$4,973