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Commitments and Contingencies (Tables)
3 Months Ended
Mar. 31, 2021
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]  
Schedule of fair falue for off-balance sheet risks
The following table presents the commitments to extend credit and standby letters of credit as of March 31, 2021 and December 31, 2020:
(Dollars in thousands)March 31, 2021December 31, 2020
Unused commitments to extend credit$12,126,186 $12,098,417 
Standby letters of credit139,572 129,819