Restrictions on Cash and Cash Equivalents (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Cash and Cash Equivalents [Abstract]
Collateral	$ 35.9	$ 17.4

Derivatives And Other Contracts, Collateral, Right To Reclaim Cash

No definition available.

Name:	fult_DerivativesAndOtherContractsCollateralRightToReclaimCash
Namespace Prefix:	fult_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant