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Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2019
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 September 30, 2019 and December 31, 2018:
(Dollars in thousands)
September 30, 2019
 
December 31, 2018
Unused commitments to extend credit
$
10,509,643

 
$
10,054,712

Standby letters of credit
92,585

 
96,467