Name:	sivb_CashCollateralAvailableToReimburseLetterOfCreditLosses
Namespace Prefix:	sivb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Commitments and Contingencies Disclosure [Line Items]

No definition available.

Name:	sivb_CommitmentsAndContingenciesDisclosureLineItems
Namespace Prefix:	sivb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Commitments Expiration Period

No definition available.

Name:	sivb_CommitmentsExpirationPeriod
Namespace Prefix:	sivb_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Fund Commitments, Call Unrestricted, Percentage of Committed Capital

No definition available.

Name:	sivb_FundCommitmentsCallUnrestrictedPercentageofCommittedCapital
Namespace Prefix:	sivb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The expected period that is customary for most of the committed capital for fund investments to be called

No definition available.

Name:	sivb_FundCommitmentsInvestmentCycle
Namespace Prefix:	sivb_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Total collateral in the form of securities available to us to reimburse losses, if any, under financial and performance standby letters of credit

No definition available.

Name:	sivb_SecuritiesCollateralAvailableToReimburseLetterOfCreditLosses
Namespace Prefix:	sivb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response)
-URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 13
-Section A

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

Name:	sivb_InvestmentHoldingsAxis=sivb_VentureCapitalAndPrivateEquityFundInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: