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REGULATORY MATTERS, COMMITMENTS AND CONTINGENCIES - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Jan. 01, 2020
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]    
Percentage Of Increase In ACL Adjusted In Capital Measures   25.00%
Commitments To Extend Credit [Member]    
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]    
Commitmets to extend credit $ 2,100.0  
Commitments To Extend Credit [Member] | Credit Card [Member]    
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]    
Commitmets to extend credit 1,200.0  
Commitments To Extend Credit [Member] | Commercial And Financial Standby Letters Of Credit [Member]    
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]    
Commitmets to extend credit 151.4  
ASU 2016-13 | Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Earnings [Member]    
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]    
Cumulative Effect Of New Accounting Principle In Period Of Adoption 1 16.2  
CECL, amount excluded to be phased-on during after two years $ 48.6