Quarterly report [Sections 13 or 15(d)]

LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Schedule for Allowance for Loan Loss Activity, by Portfolio Segment, Balances for Allowance for Credit Losses, and Loans Based on Impairment Methodology) (Details)

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LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Schedule for Allowance for Loan Loss Activity, by Portfolio Segment, Balances for Allowance for Credit Losses, and Loans Based on Impairment Methodology) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Allowance for loan losses:        
Balance, beginning of period $ 298,756 $ 315,574 $ 295,108 $ 178,644
Loans charged off (4,547) (40,440) (10,761) (45,905)
Recoveries credited to allowance 2,276 1,847 4,911 4,368
Provision (release) charged to operations 4,947 16,054 12,174 38,125
Balance, end of period 301,432 293,035 301,432 293,035
CRE        
Allowance for loan losses:        
Balance, beginning of period 173,761   152,477  
Loans charged off (15)   (923)  
Recoveries credited to allowance 171   883  
Provision (release) charged to operations (2,695)   18,785  
Balance, end of period 171,222   171,222  
Commercial and Industrial        
Allowance for loan losses:        
Balance, beginning of period 60,492   80,336  
Loans charged off (3,996)   (7,844)  
Recoveries credited to allowance 1,850   2,926  
Provision (release) charged to operations 6,458   (10,614)  
Balance, end of period 64,804   64,804  
Commercial        
Allowance for loan losses:        
Balance, beginning of period   257,403   148,887
Loans charged off   (39,575)   (42,958)
Recoveries credited to allowance   1,223   2,999
Provision (release) charged to operations   14,708   38,836
Balance, end of period   233,759   233,759
Consumer        
Allowance for loan losses:        
Balance, beginning of period 64,503 58,171 62,295 29,757
Loans charged off (536) (865) (1,994) (2,947)
Recoveries credited to allowance 255 624 1,102 1,369
Provision (release) charged to operations 1,184 1,346 4,003 (711)
Balance, end of period $ 65,406 59,276 65,406 59,276
Sandy Spring        
Allowance for loan losses:        
Initial ACL recognized charge offs before acquisition   $ 19,000 $ 39,500 53,500
Sandy Spring | PCD Loans        
Allowance for loan losses:        
Initial allowance - PCD loans       28,265
Sandy Spring | Non-PCD Loans        
Allowance for loan losses:        
Initial provision - non-PCD loans       89,538
Sandy Spring | Commercial | PCD Loans        
Allowance for loan losses:        
Initial allowance - PCD loans       21,255
Sandy Spring | Commercial | Non-PCD Loans        
Allowance for loan losses:        
Initial provision - non-PCD loans       64,740
Sandy Spring | Consumer | PCD Loans        
Allowance for loan losses:        
Initial allowance - PCD loans       7,010
Sandy Spring | Consumer | Non-PCD Loans        
Allowance for loan losses:        
Initial provision - non-PCD loans       $ 24,798