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COMMITMENTS AND CONTINGENCIES (Tables)
 3 Months Ended
Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Guarantor Obligations A summary of the Company’s commitments is as follows:
(dollars in thousands)March 31, 2022December 31, 2021
Commitments to extend credit$4,817,539 $4,328,749 
Unused home equity lines of credit284,144 272,029 
Financial standby letters of credit31,440 36,184 
Mortgage interest rate lock commitments520,939 417,126 
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 March 31,
(dollars in thousands)20222021
Balance at beginning of period$33,185 $32,854 
Provision for unfunded commitments9,009 (11,839)
Balance at end of period$42,194 $21,015