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Goodwill and Other Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
Goodwill. Year-end goodwill was as follows:
20202019
Goodwill$654,952 $654,952 
Schedule of Other Intangible Assets
Other Intangible Assets. Year-end other intangible assets were as follows:
Gross
Intangible
Assets
Accumulated
Amortization
Net
Intangible
Assets
2020
Core deposits$9,300 $(8,004)$1,296 
Customer relationships2,886 (2,619)267 
$12,186 $(10,623)$1,563 
2019
Core deposits$9,300 $(7,257)$2,043 
Customer relationships3,388 (2,950)438 
$12,688 $(10,207)$2,481 
Estimated Aggregate Future Amortization Expense for Intangible Assets The estimated aggregate future amortization expense for intangible assets remaining as of December 31, 2020 is as follows:
2021$697 
2022481 
2023282 
202487 
202511 
Thereafter
$1,563