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 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Disaggregation of Revenue        
Service charges on deposit accounts $ 12,259 $ 12,220 $ 24,374 $ 21,905
Other service charges, commissions and fees 2,286 2,245 4,224 4,007
Interchange fees 3,750 3,779 7,076 6,727
Fiduciary and asset management fees 21,460 17,723 41,638 24,420
Mortgage banking income 2,656 2,821 4,682 3,794
Bank owned life insurance income 5,734 7,327 10,934 10,864
Loan-related interest rate swap fees 6,484 1,733 10,458 4,133
Other operating income 35,619 33,674 41,645 34,835
Total noninterest income 90,248 81,522 145,031 110,685
Gain on CRE loan sale     0 15,720
Overdraft fees        
Disaggregation of Revenue        
Service charges on deposit accounts 5,907 6,063 11,943 11,640
Maintenance fees & other        
Disaggregation of Revenue        
Service charges on deposit accounts 6,352 6,157 12,431 10,265
Trust asset management fees        
Disaggregation of Revenue        
Fiduciary and asset management fees 11,302 7,987 21,915 11,811
Registered advisor management fees        
Disaggregation of Revenue        
Fiduciary and asset management fees 7,852 6,902 15,232 6,904
Brokerage management fees, net        
Disaggregation of Revenue        
Fiduciary and asset management fees 2,306 2,834 4,491 5,705
Product and Service, Other [Member]        
Disaggregation of Revenue        
Other service charges, commissions and fees 2,286 2,245 4,224 4,007
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   15,700   15,700
Operating segments | Wholesale Banking        
Disaggregation of Revenue        
Service charges on deposit accounts 4,684 4,271 9,095 7,281
Other service charges, commissions and fees 649 508 1,084 904
Fiduciary and asset management fees 19,021 15,758 36,901 20,529
Mortgage banking income 0 0 0 0
Total noninterest income 32,866 23,652 61,810 35,451
Operating segments | Consumer Banking        
Disaggregation of Revenue        
Service charges on deposit accounts 7,575 7,949 15,279 14,624
Other service charges, commissions and fees 1,637 1,623 3,140 2,988
Fiduciary and asset management fees 2,439 1,965 4,737 3,891
Mortgage banking income 2,656 2,821 4,682 3,794
Total noninterest income 19,093 19,661 37,445 34,295
Corporate Other        
Disaggregation of Revenue        
Service charges on deposit accounts 0 0 0 0
Other service charges, commissions and fees 0 114 0 115
Fiduciary and asset management fees 0 0 0 0
Mortgage banking income 0 0 0 0
Total noninterest income $ 38,289 $ 38,209 $ 45,776 $ 40,939