Loans and Allowance for Loan Losses (Details 14) (Non-acquired loans, USD $)	Dec. 31, 2012 item	Dec. 31, 2011 item
Loans and Allowance for Loan Losses
Specific reserve associated with restructured loans	$ 1,100,000
Remaining availability under commitments to lend additional funds on restructured loans	161,000
Paying Under Restructured Loans
Loans and Allowance for Loan Losses
Number of loans	9	25
Recorded Investment	7,360,000	9,711,000
Converted to Non-Accrual
Loans and Allowance for Loan Losses
Number of loans		1
Recorded Investment		294,000
Interest rate modification \| Paying Under Restructured Loans
Loans and Allowance for Loan Losses
Number of loans	6	21
Recorded Investment	5,836,000	5,621,000
Term modification \| Paying Under Restructured Loans
Loans and Allowance for Loan Losses
Number of loans	3	4
Recorded Investment	1,524,000	4,090,000
Term modification \| Converted to Non-Accrual
Loans and Allowance for Loan Losses
Number of loans		1
Recorded Investment		$ 294,000

Represents the amount in remaining availability under commitments to lend additional funds on restructured loans.

No definition available.

Name:	scbt_FinancingReceivableTroubledDebtRestructuringAmountInRemainingAvailabilityUnderCommitmentsToLendAdditionalFunds
Namespace Prefix:	scbt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of allowance for credit losses related to receivables which had been measured under a general allowance for credit losses methodology that are now identified as troubled debt restructurings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 65

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7484272&loc=SL7484277-172609

+ Details

Name:	us-gaap_AllowanceForCreditLossesChangeInMethodOfCalculatingImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 33

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953676-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsNumberOfContracts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of receivables for which the allowance for credit losses had previously been measured under a general allowance for credit losses methodology, and are now identified as troubled debt restructurings.

+ References

+ Details

Name:	us-gaap_ReceivablesChangeInMethodOfCalculatingImpairmentRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant