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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]  
Summary of Changes in ACL on Off-balance Sheet Credit Exposures

Changes in the ACL on off-balance sheet credit exposures were as follows for the periods presented ($ in thousands):

 

 

 

Years Ended December 31,

 

 

 

2022

 

 

2021

 

 

2020

 

Balance at beginning of period

 

$

35,623

 

 

$

38,572

 

 

$

—

 

FASB ASU 2016-13 adoption adjustment

 

 

—

 

 

 

—

 

 

 

29,638

 

PCL, off-balance sheet credit exposures (1)

 

 

1,215

 

 

 

(2,949

)

 

 

8,934

 

Balance at end of period

 

$

36,838

 

 

$

35,623

 

 

$

38,572

 
(1)
During 2021, Trustmark reclassified its credit loss expense related to off-balance sheet credit exposures from noninterest expense to PCL, off-balance sheet credit exposures. Prior periods have been reclassified accordingly.