Loans and Allowance for Credit Losses TDRs by Class Segment (Details) $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($) loans	Mar. 31, 2019 USD ($) loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment \| $	$ 1,703	$ 4,206
Number of Loans \| loans	17	20
Real estate - residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment \| $	$ 660	$ 917
Number of Loans \| loans	7	4
Real-estate - commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment \| $	$ 392	$ 0
Number of Loans \| loans	1	0
Real-estate - home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment \| $	$ 577	$ 829
Number of Loans \| loans	8	12
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment \| $	$ 74	$ 2,460
Number of Loans \| loans	1	4

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

+ Details

Name:	us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after troubled debt restructuring, of modified financing receivable.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_HomeEquityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=fult_CommercialSecuredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: