Name:	srce_FinancingReceivableModificationsDefaultedInCurrentPeriodNumberOfContracts
Namespace Prefix:	srce_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The number of financing receivables that have been modified during the period by troubled debt restructurings.

No definition available.

Name:	srce_FinancingReceivableModificationsMadeNumberOfContracts
Namespace Prefix:	srce_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

No definition available.

Name:	srce_FinancingReceivableModificationsMadeRecordedInvestment
Namespace Prefix:	srce_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	srce_FinancingReceivableModificationsSubsequentPaymentDefaultAbstract
Namespace Prefix:	srce_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Represents the threshold period of time used to determine if a modified loan is in default or transferred to nonaccrual.

No definition available.

Name:	srce_FinancingReceivableModificationsSubsequentPaymentDefaultPeriodPastDue
Namespace Prefix:	srce_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6951948&loc=d3e18845-111554