Quarterly report [Sections 13 or 15(d)]

SEGMENT REPORTING AND REVENUE (Disaggregation of Noninterest Income by Major Source) (Details)

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SEGMENT REPORTING AND REVENUE (Disaggregation of Noninterest Income by Major Source) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Disaggregation of Revenue        
Service charges on deposit accounts $ 12,886 $ 12,838 $ 37,261 $ 34,743
Other service charges, commissions and fees 2,266 2,325 6,490 6,332
Interchange fees 3,697 4,089 10,773 10,816
Fiduciary and asset management fees 20,452 18,595 62,090 43,014
Mortgage banking income 1,528 2,811 6,211 6,605
Bank owned life insurance income 5,954 5,116 16,888 15,979
Loan-related interest rate swap fees 4,530 5,911 14,988 10,043
Other operating income 3,479 66 45,122 34,904
Total noninterest income 54,792 51,751 199,823 162,436
Gain on CRE loan sale     0 10,915
Overdraft fees        
Disaggregation of Revenue        
Service charges on deposit accounts 6,608 6,396 18,551 18,036
Maintenance fees & other        
Disaggregation of Revenue        
Service charges on deposit accounts 6,278 6,442 18,710 16,707
Trust asset management fees        
Disaggregation of Revenue        
Fiduciary and asset management fees 10,126 8,730 32,041 20,542
Registered advisor management fees        
Disaggregation of Revenue        
Fiduciary and asset management fees 7,915 7,240 23,147 14,143
Brokerage management fees, net        
Disaggregation of Revenue        
Fiduciary and asset management fees 2,411 2,625 6,902 8,329
Product and Service, Other [Member]        
Disaggregation of Revenue        
Other service charges, commissions and fees 2,266 2,325 6,490 6,332
Cary Street Partners, LLC        
Disaggregation of Revenue        
Gain on sale of equity interests   14,300 0 14,300
Bearing Insurance Group, LLC        
Disaggregation of Revenue        
Gain on sale of equity interests 32,350   32,350 0
Sandy Spring | CRE        
Disaggregation of Revenue        
Gain on CRE loan sale   4,800   10,900
Operating segments | Wholesale Banking        
Disaggregation of Revenue        
Service charges on deposit accounts 4,625 4,537 13,721 11,818
Other service charges, commissions and fees 662 813 1,746 1,717
Fiduciary and asset management fees 17,967 16,548 54,868 37,076
Mortgage banking income 0 0 0 0
Total noninterest income 29,486 29,000 91,296 64,450
Operating segments | Consumer Banking        
Disaggregation of Revenue        
Service charges on deposit accounts 8,261 8,301 23,540 22,925
Other service charges, commissions and fees 1,604 1,437 4,744 4,426
Fiduciary and asset management fees 2,485 2,047 7,222 5,938
Mortgage banking income 1,528 2,811 6,211 6,605
Total noninterest income 18,864 19,945 56,309 54,240
Corporate Other        
Disaggregation of Revenue        
Service charges on deposit accounts 0 0 0 0
Other service charges, commissions and fees 0 75 0 189
Fiduciary and asset management fees 0 0 0 0
Mortgage banking income 0 0 0 0
Total noninterest income $ 6,442 $ 2,806 $ 52,218 $ 43,746