Investment Securities Narrative (Details) (USD $)	12 Months Ended
Dec. 31, 2014 Security	Dec. 31, 2013	Dec. 31, 2012
Available-for-sale securities pledged as collateral	$ 1,700,000,000	$ 1,700,000,000
Available-for-sale securities, amortized cost basis	2,312,087,000	2,608,210,000
Single bank stock investment, cost basis	20,000,000fult_SinglebankstockinvestmentCostBasis
Bank stock investment, fair value	30,400,000fult_Bankstockinvestmentfairvalue
Percent ownership in an individual financial institution	72.70%
Individual bank stock investment percent to total portfolio	5.00%
Proceeds from sales of securities available for sale	32,227,000	267,126,000	244,702,000
Net Gains	2,041,000	8,004,000	3,026,000
Securities available for sale	2,323,371,000us-gaap_AvailableForSaleSecurities	2,568,434,000us-gaap_AvailableForSaleSecurities
Pooled trusts sold	3fult_PooledTrustsSold
Number pooled trust securities	5fult_NumberPooledTrustSecurities
Domestic corporate debt securities	98,000,000fult_DomesticCorporateDebtSecurities
Equity securities
Available-for-sale securities, amortized cost basis	33,469,000	33,922,000
Net Gains	323,000	4,336,000	2,264,000
Securities available for sale	47,623,000	46,201,000
Equity Securities Financial Institution
Available-for-sale securities, equity securities	41,800,000	40,600,000
Available-for-sale securities, amortized cost basis	27,700,000
Equity Securities, Miscellaneous
Available-for-sale securities, equity securities	5,800,000	5,600,000
Pooled trust preferred securities
Available-for-sale securities, amortized cost basis	728,000
Net Gains	1,700,000
Auction rate securities
Available-for-sale securities, amortized cost basis	108,751,000	172,299,000
Proceeds from sales of securities available for sale	11,900,000
Available-for-sale securities, sold at par	51,200,000
Securities available for sale	100,941,000	159,274,000
Single-issuer trust preferred securities
Number of Trust Preferred Securities	20
Unrealized gain (loss) on securities	(5,600,000)
External Credit Rating, Rated Above Investment Grade \| Auction rate securities
Carrying value auction rate securities rated AAA	95,500,000
Percentage auction rate securities rated AAA	95.00%
External Credit Rated AAA \| Auction rate securities
Carrying value auction rate securities rated AAA	5,400,000
Percentage auction rate securities rated AAA	5.00%
External Credit Rating, Rated Below Investment Grade \| Pooled trust preferred securities
Available-for-sale securities, amortized cost basis	2,000,000
Securities available for sale	4,100,000
External Credit Rating, Rated Below Investment Grade \| Single-issuer trust preferred securities
Available-for-sale securities, amortized cost basis	14,500,000
Securities available for sale	12,400,000
Number of trust preferred securities	7
External Credit Rating, BBB \| Single-issuer trust preferred securities
Available-for-sale securities, amortized cost basis	4,700,000
Securities available for sale	$ 3,800,000

Investment in the common stock of an individual financial institution, at fair value.

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Carrying value of auction rate securities with credit ratings of AAA.

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The fair value as of the balance sheet date of firm holdings in debt obligations issued by corporate entities.

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Percentage which none of the fair values of Corporation's individual bank stock investments exceed the fair value of the entire portfolio.

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Number of Trust Preferred Securities Below Investment Grade.

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Percentage of auction rate securities with credit ratings of AAA.

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Fair value of ownership in a single financial institution as a percentage of the Corporation's entire financial institutions stock portfolio.

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Pooled Trusts Sold

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount of equity securities categorized neither as held-to-maturity nor as trading.

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The fair value of available-for-sale securities that serve as collateral for borrowings.

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Amount of unrealized gain (loss) recognized in the income statement on unsold other securities.

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