XML 25 R6.htm IDEA: XBRL DOCUMENT v2.3.0.15

Condensed Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) (USD $) In Thousands, except Per Share data	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Condensed Consolidated Statements Of Changes In Shareholders' Equity [Abstract]
Cash dividends declared per common share	$ 0.09	$ 0.05
ESOP market value adjustment, gross	$ 762	$ 772
ESOP market value adjustment, tax benefit	$ 267	$ 270

X

- Definition

Gross adjustment to additional paid-in-capital resulting from changes in market value of common and preferred stock issued to employee benefit trust but unearned.

+ Details

Name:	fcf_AdjustmentsToAdditionalPaidInCapitalMarkToMarketGross
Namespace Prefix:	fcf
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The tax effect of gross adjustment to additional paid-in-capital resulting from changes in market value of common and preferred stock issued to employee benefit trust but unearned.

+ Details

Name:	fcf_AdjustmentsToAdditionalPaidInCapitalMarkToMarketTax
Namespace Prefix:	fcf
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 04



-Article 3







Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 505



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.3-04)



-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementOfStockholdersEquityAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration