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Core Deposit Intangibles (Tables)
 9 Months Ended
Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of core deposit
The carrying basis and accumulated amortization of recognized core deposit intangibles are noted below.
September 30, 2020December 31, 2019
Gross carrying amount$102,396 $85,869 
Core deposit intangibles acquired— 16,527 
Accumulated amortization(71,945)(67,434)
Total core deposit intangibles$30,451 $34,962 
Schedule of estimated future amortization expense Estimated future amortization expense is summarized as follows:
Amortization Expense
2020$1,476 
20215,429 
20225,027 
20234,827 
20244,241 
After 20249,451 
$30,451