Restrictions on Cash and Cash Equivalents (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Cash and Due from Banks [Abstract]
Collateral	$ 202.8	$ 408.1

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