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COMMITMENTS AND CONTINGENCIES (Tables)
 6 Months Ended
Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Guarantor Obligations A summary of the Company’s commitments is as follows:
(dollars in thousands)June 30, 2022December 31, 2021
Commitments to extend credit$5,420,227 $4,328,749 
Unused home equity lines of credit303,428 272,029 
Financial standby letters of credit30,272 36,184 
Mortgage interest rate lock commitments320,320 417,126 
Schedule of Allowance for Credit Loss for Unfunded Commitments The following table presents activity in the allowance for unfunded commitments for the periods presented:
Three Months Ended June 30,Six Months Ended June 30,
(dollars in thousands)2022202120222021
Balance at beginning of period$42,194 $21,015 $33,185 $32,854 
Provision for unfunded commitments1,779 1,299 10,788 (10,540)
Balance at end of period$43,973 $22,314 $43,973 $22,314