Derivative Financial Instruments (Details 2) (First Financial Holdings Inc, USD $)	9 Months Ended
Sep. 30, 2013
Forward commitments
Derivative Financial Instruments
Net fair value of the open contracts	$ (569,000)
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Obligation	51,267,000
Mortgage loan pipeline commitments
Derivative Financial Instruments
Net fair value of the open contracts	714,000
MSRs
Changes in the fair value of MSRs and its offsetting hedge
Decrease in fair value of MSRs	(771,000)
Gain (loss) related to derivatives	276,000
Net effect on Consolidated Statements of Income	(495,000)
Mortgage loan pipeline
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Obligation	33,894,000
Expected closures
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Obligation	25,421,000
Non-designated hedges
Derivative Financial Instruments
Notional amount	77,500,000
Non-designated hedges \| Mortgage servicing rights hedging
Derivative Financial Instruments
Net fair value of the open contracts recorded as an asset	$ 965,000

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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- Definition

The amounts related to derivatives that offset the gain (loss) on changes of the fair value financial instruments.

+ References

No definition available.

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- Definition

Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

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-Paragraph 10A, 10B

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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- Definition

Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.

+ References

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The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

+ References

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-Publisher FASB

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- Definition

The increase (decrease) during the period, which was recognized in earnings, in the unrealized gains or losses on derivative instruments that are not or are no longer designated as hedging instruments.

+ References

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This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

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