Interim Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital		Retained Earnings	Accumulated Other Comprehensive Income	Total SVBFG Stockholders’ Equity	Noncontrolling Interests
Balance (in shares) at Dec. 31, 2015		51,610,226
Balance at Dec. 31, 2015	$ 3,333,231	$ 52	$ 1,189,032		$ 1,993,646	$ 15,404	$ 3,198,134	$ 135,097
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under employee benefit plans, net of restricted stock cancellations (in shares)		372,282
Common stock issued under employee benefit plans, net of restricted stock cancellations	6,852	$ 0	6,852				6,852
Common stock issued under ESOP (in shares)		43,165
Common stock issued under ESOP	4,328		4,328				4,328
Income tax effect from stock options exercised, vesting of restricted stock and other (1)	(6,587)		(6,587)	[1]			(6,587)
Net income	170,977				172,138		172,138	(1,161)
Noncontrolling Interest, Period Increase (Decrease)	(5,721)							(5,721)
Net change in unrealized gains and losses on AFS securities, net of tax	118,610					118,610	118,610
Amortization of unrealized gains on securities transferred from AFS to HTM, net of tax	(2,879)					(2,879)	(2,879)
Foreign currency translation adjustments, net of tax	(1,214)					(1,214)	(1,214)
Share-based compensation, net	16,196		16,196				16,196
Balance (in shares) at Jun. 30, 2016		52,025,673
Balance at Jun. 30, 2016	3,633,793	$ 52	1,209,821		2,165,784	129,921	3,505,578	128,215
Balance (in shares) at Dec. 31, 2016		52,254,074
Balance at Dec. 31, 2016	3,777,037	$ 52	1,242,741		2,376,331	23,430	3,642,554	134,483
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under employee benefit plans, net of restricted stock cancellations (in shares)		419,247
Common stock issued under employee benefit plans, net of restricted stock cancellations	11,822	$ 1	11,821				11,822
Common stock issued under ESOP (in shares)		10,838
Common stock issued under ESOP	2,094		2,094				2,094
Net income	240,396				224,676		224,676	15,720
Noncontrolling Interest, Period Increase (Decrease)	(9,603)							(9,603)
Net change in unrealized gains and losses on AFS securities, net of tax	(8,047)					(8,047)	(8,047)
Amortization of unrealized gains on securities transferred from AFS to HTM, net of tax	(1,994)					(1,994)	(1,994)
Foreign currency translation adjustments, net of tax	1,501					1,501	1,501
Share-based compensation, net	26,829		26,829				26,829
Balance (in shares) at Jun. 30, 2017		52,684,159
Balance at Jun. 30, 2017	$ 4,040,035	$ 53	$ 1,283,485		$ 2,601,007	$ 14,890	$ 3,899,435	$ 140,600

[1] During the first quarter of 2017 we adopted ASU 2016-09, Improvements to Employee Share-Based Payment Accounting. The amendments in this ASU require that all excess tax benefits and tax deficiencies associated with share-based compensation be recognized in income tax expense or benefit in the income statement. Previously, tax effects resulting from changes in the Company's share price subsequent to grant date of share-based compensation awards were recorded through additional paid-in-capital in stockholders' equity at the time of vesting and exercise. This guidance was adopted on a prospective basis with no change to prior period amounts. 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.