Interim Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands		Total		Common Stock	Additional Paid-in Capital	Retained Earnings		Accumulated Other Comprehensive Income (Loss)	Total SVBFG Stockholders’ Equity	Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effective of adopting ASU 2014-01 | Accounting Standards Update 2014-01	[1]	$ (4,635)				$ (4,635)			$ (4,635)
Balance (in shares) (Previously Reported) at Dec. 31, 2013				45,800,418
Balance (in shares) at Dec. 31, 2013				45,800,418
Balance (Previously Reported) at Dec. 31, 2013		3,079,328		$ 46	$ 624,256	1,390,732	[1]	$ (48,764)	1,966,270	$ 1,113,058
Balance at Dec. 31, 2013		3,074,693		$ 46	624,256	1,386,097		(48,764)	1,961,635	1,113,058
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under employee benefit plans, net of restricted stock cancellations (in shares)				379,026
Common stock issued under employee benefit plans, net of restricted stock cancellations		8,127		$ 0	8,127				8,127
Common stock issued under ESOP (in shares)				30,762
Common stock issued under ESOP		3,890			3,890				3,890
Income tax benefit from stock options exercised, vesting of restricted stock and other		6,164			6,164				6,164
Net income	[1]	284,711	[2],[3],[4],[5]			141,903			141,903	142,808
Capital calls and distributions, net		6,419								6,419
Net change in unrealized gains and losses on available-for-sale securities, net of tax		76,176						76,176	76,176
Held-to-maturity securities, transferred securities, unrealized gains, net of tax		22,522						22,522	22,522
Amortization of unrealized gains on securities transferred from available-for-sale to held-to-maturity, net of tax		(625)						(625)	(625)
Foreign currency translation adjustments, net of tax		967						967	967
Common stock issued in public offering (in shares)				4,485,000
Common stock issued in public offering		434,866		$ 5	434,861	0			434,866
Share-based compensation expense		15,284			15,284				15,284
Balance (in shares) at Jun. 30, 2014	[1]			50,695,206
Balance at Jun. 30, 2014	[1]	3,933,194		$ 51	1,092,582	1,528,000		50,276	2,670,909	1,262,285
Balance (in shares) at Dec. 31, 2014	[1]			50,924,925
Balance at Dec. 31, 2014	[1]	4,051,734		$ 51	1,120,350	1,649,967		42,704	2,813,072	1,238,662
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under employee benefit plans, net of restricted stock cancellations (in shares)				509,146
Common stock issued under employee benefit plans, net of restricted stock cancellations		13,582			13,582				13,582
Common stock issued under ESOP (in shares)				27,425
Common stock issued under ESOP		3,512			3,512				3,512
Income tax benefit from stock options exercised, vesting of restricted stock and other		10,157			10,157				10,157
Deconsolidation of noncontrolling interest		(1,069,437)								(1,069,437)
Net income		196,849	[2],[3],[4],[5],[6]			174,659			174,659	22,190
Capital calls and distributions, net		(53,045)								(53,045)
Net change in unrealized gains and losses on available-for-sale securities, net of tax		22,910						22,910	22,910
Amortization of unrealized gains on securities transferred from available-for-sale to held-to-maturity, net of tax		(3,246)						(3,246)	(3,246)
Foreign currency translation adjustments, net of tax		1,549						1,549	1,549
Share-based compensation expense		14,907			14,907				14,907
Balance (in shares) at Jun. 30, 2015				51,461,496
Balance at Jun. 30, 2015		$ 3,189,472		$ 51	$ 1,162,508	$ 1,824,626		$ 63,917	$ 3,051,102	$ 138,370

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[2] Amounts for the six months ended June 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.

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

[4] 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.

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