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

No definition available.

+ Details

Name:	sivb_FinancingReceivableModificationsRecordedInvestmentModifiedDuringPeriod
Namespace Prefix:	sivb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Financing Receivable Modifications Recorded Investment Subsequently Defaulted

+ References

No definition available.

+ Details

Name:	sivb_FinancingReceivableModificationsRecordedInvestmentSubsequentlyDefaulted
Namespace Prefix:	sivb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Reflects the amount of the write-down related to a troubled debt restructuring.

+ References

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=25495931&loc=d3e18845-111554

+ Details

Name:	us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sivb_LifeScienceFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sivb_OtherFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_PaymentDeferralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_PrincipalForgivenessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=sivb_CourtOrderMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sivb_SoftwareFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sivb_HardwareFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sivb_PremiumWineFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Loans and Allowance for Loan Losses - Recorded Investment in Loans Modified in TDRs (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period	$ 81,800,000		$ 89,800,000
Loans classified as TDRs, charge-offs	22,400,000	$ 0	21,500,000	$ 0
Life science & healthcare
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period	29,530,000	0
Other
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period	518,000	0	518,000	0
Payment deferral
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period				7,100,000
Partial principal forgiveness
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period				1,300,000
Court Order [Member]
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period			1,500,000
Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period	81,797,000	496,000	89,845,000	8,462,000
TDRs modified within the previous 12 months that defaulted during the period	14,096,000		20,113,000
Commercial Portfolio Segment \| Software and internet
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period	51,749,000	496,000	57,766,000	7,848,000
TDRs modified within the previous 12 months that defaulted during the period	11,107,000		17,124,000
Commercial Portfolio Segment \| Hardware
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period	0	0	2,031,000	0
TDRs modified within the previous 12 months that defaulted during the period	2,031,000		2,031,000
Commercial Portfolio Segment \| Life science & healthcare
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period			29,530,000	0
TDRs modified within the previous 12 months that defaulted during the period	958,000		958,000
Commercial Portfolio Segment \| Premium wine
Financing Receivable, Modifications [Line Items]
Loans modified in TDRs during the period	$ 0	$ 0	$ 0	$ 614,000