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Commitments and Contingencies (Tables)
6 Months Ended
Jun. 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 unfunded commitments as of June 30, 2019 and December 31, 2018:
(Dollars in thousands)
June 30, 2019
 
December 31, 2018
Unused commitments to extend credit
$
10,348,284

 
$
10,054,712

Standby letters of credit
94,307

 
96,467

Unfunded commitments for investments in affordable housing projects
80,383

 
67,952