Regulatory Matters (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total amount available for payment of dividends	$ 131,800
Maximum allowed percentage of loans issued to a single affiliate	10.00%
Maximum allowed percentage of loans issued to all affiliates	20.00%
Total Capital (to Risk-Weighted Assets):
Capital	$ 3,184,496	$ 3,051,813
Capital to risk weighted assets	0.140	0.136
Capital required for capital adequacy	$ 1,817,712	$ 1,799,138
Capital required for capital adequacy to risk weighted assets	0.080	0.080
Tier I Capital (to Risk-Weighted Assets):
Tier one risk based capital	$ 2,541,819	$ 2,447,018
Tier one risk based capital to risk weighted assets	0.112	0.109
Tier one risk based capital required for capital adequacy	$ 1,363,284	$ 1,349,353
Tier one risk based capital required for capital adequacy to risk weighted assets	0.060	0.060
Common Equity Tier I Capital (to Risk-Weighted Assets):
Common equity tier 1 capital	$ 2,348,941	$ 2,254,140
Common equity tier one capital ratio	0.103	0.100
Common equity tier one capital required for capital adequacy	$ 1,022,463	$ 1,012,015
Common equity tier one capital required for capital adequacy to risk weighted assets	4.50%	4.50%
Tier I Leverage Capital (to Average Assets):
Tier one leverage capital	$ 2,541,819	$ 2,447,018
Tier one leverage capital to average assets	0.095	0.095
Tier one leverage capital required for capital adequacy	$ 1,072,189	$ 1,032,543
Tier one leverage capital required for capital adequacy to average assets	0.040	0.040
Fulton Bank, N.A.
Total Capital (to Risk-Weighted Assets):
Capital	$ 2,896,908	$ 2,846,302
Capital to risk weighted assets	0.128	0.127
Capital required for capital adequacy	$ 1,809,836	$ 1,786,472
Capital required for capital adequacy to risk weighted assets	0.080	0.080
Capital required to be well capitalized	$ 2,262,295	$ 2,233,090
Capital required to be well capitalized to risk weighted assets	0.100	0.100
Tier I Capital (to Risk-Weighted Assets):
Tier one risk based capital	$ 2,620,837	$ 2,612,363
Tier one risk based capital to risk weighted assets	0.116	0.117
Tier one risk based capital required for capital adequacy	$ 1,357,377	$ 1,339,854
Tier one risk based capital required for capital adequacy to risk weighted assets	0.060	0.060
Tier one risk based capital required to be well capitalized	$ 1,809,836	$ 1,786,472
Tier one risk based capital required to be well capitalized to risk weighted assets	0.080	0.080
Common Equity Tier I Capital (to Risk-Weighted Assets):
Common equity tier 1 capital	$ 2,576,837	$ 2,568,363
Common equity tier one capital ratio	0.114	0.115
Common equity tier one capital required for capital adequacy	$ 1,018,033	$ 1,004,890
Common equity tier one capital required for capital adequacy to risk weighted assets	4.50%	4.50%
Common equity tier one capital required to be well-capitalized	$ 1,470,492	$ 1,451,508
Common equity tier one capital required to be well capitalized to risk weighted assets	6.50%	6.50%
Tier I Leverage Capital (to Average Assets):
Tier one leverage capital	$ 2,620,837	$ 2,612,363
Tier one leverage capital to average assets	0.096	0.101
Tier one leverage capital required for capital adequacy	$ 1,089,195	$ 1,035,915
Tier one leverage capital required for capital adequacy to average assets	0.040	0.040
Tier one leverage capital required to be well capitalized	$ 1,361,494	$ 1,294,893
Tier one leverage capital required to be well capitalized to average assets	0.050	0.050