Interim Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015		Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income before noncontrolling interests	[1],[2],[3]	$ 87,962	$ 64,154	$ 284,811	[4],[5]	$ 348,865	[5],[6]
Change in cumulative translation gains:
Foreign currency translation gains (losses)		(102)	(2,259)	2,588		(638)
Related tax benefit (expense)		87	935	(1,054)		281
Change in unrealized gains on available-for-sale securities:
Unrealized holding gains (losses)		58,902	(48,724)	100,468		62,669
Related tax (expense) benefit		(24,200)	19,716	(41,224)		(25,292)
Reclassification adjustment for (gains) losses included in net income		(13)	990	(2,750)		17,411
Related tax expense (benefit)		6	(400)	1,111		(7,030)
Cumulative-effect adjustment for unrealized gains on securities transferred from available-for-sale to held-to-maturity		0	0	0		37,700
Related tax expense		0	0	0		(15,178)
Amortization of unrealized losses on securities transferred from available-for-sale to held-to-maturity		(2,565)	(2,996)	(7,997)		(4,043)
Related tax benefit		1,032	1,206	3,218		1,628
Other comprehensive income (loss), net of tax		33,147	(31,532)	54,360		67,508
Comprehensive income		121,109	32,622	339,171		416,373
Comprehensive income attributable to noncontrolling interests (2)	[1]	(6,229)	(177)	(28,419)	[4]	(142,985)
Comprehensive income attributable to SVBFG		$ 114,880	$ 32,445	$ 310,752		$ 273,388

[1] Amounts for the nine months ended September 30, 2015, have been revised to reflect the retrospective application of new accounting guidance adopted in the second quarter of 2015 related to our consolidated variable interest entities (ASU 2015-02). Amounts prior to January 1, 2015 have not been revised for the adoption of this guidance. See Note 1— "Basis of Presentation” of the “Notes to Interim Consolidated Financial Statements (unaudited)” under Part I, Item 1 of this report for additional details.

[2] Prior period amounts have been revised to reflect the retrospective application of new accounting guidance adopted in the first quarter of 2015 related to our investments in qualified affordable housing projects (ASU 2014-01). See Note 1— "Basis of Presentation" of the "Notes to Interim Consolidated Financial Statements" under Part I, Item 1 in this report.

[3] Prior period amounts have been revised to reflect the retrospective application of new accounting guidance adopted in the first quarter of 2015 related to our investments in qualified affordable housing projects (ASU 2014-01). See Note 1— "Basis of Presentation" of the "Notes to Interim Consolidated Financial Statements" under Part I, Item 1 in this report.

[4] Amounts for the nine months ended September 30, 2015, have been revised to reflect the retrospective application of new accounting guidance adopted in the second quarter of 2015 related to our consolidated variable interest entities (ASU 2015-02). Amounts prior to January 1, 2015 have not been revised for the adoption of this guidance. See Note 1— "Basis of Presentation” of the “Notes to Interim Consolidated Financial Statements (unaudited)” under Part I, Item 1 of this report for additional details.

[5] Cash flows for the nine months ended September 30, 2015 were revised to reflect the adoption of ASU 2015-02 as of January 1, 2015 and cash flows for the nine months ended September 30, 2014 were revised to reflect the retrospective application of our adoption of ASU 2014-01.

[6] Prior period amounts have been revised to reflect the retrospective application of new accounting guidance adopted in the first quarter of 2015 related to our investments in qualified affordable housing projects (ASU 2014-01). See Note 1— "Basis of Presentation" of the "Notes to Interim Consolidated Financial Statements" under Part I, Item 1 in this report.