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
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
Capital calls and distributions, net		(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 holding 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
Reclassification of stranded tax effect for ASU 2018-02	[1]	0
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative adjustment for ASU, net of tax | Accounting Standards Update 2014-09	[2]	(5,802)			(5,802)				(5,802)
Cumulative adjustment for ASU, net of tax | Accounting Standards Update 2016-01	[2]	74,595			103,766		(29,171)		74,595
Balance (in shares) at Dec. 31, 2017			52,835,188
Balance at Dec. 31, 2017		4,319,415	$ 53	1,314,377	2,866,837		(1,472)		4,179,795	139,620
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under employee benefit plans, net of restricted stock cancellations (in shares)			365,767
Common stock issued under employee benefit plans, net of restricted stock cancellations		7,165	$ 0	7,165					7,165
Common stock issued under ESOP (in shares)			9,672
Common stock issued under ESOP		2,577		2,577					2,577
Net income		455,052			432,759				432,759	22,293
Capital calls and distributions, net		(14,725)								(14,725)
Net change in unrealized gains and losses on AFS securities, net of tax		(52,855)					(52,855)		(52,855)
Amortization of unrealized holding gains on securities transferred from AFS to HTM, net of tax		(1,547)					(1,547)		(1,547)
Foreign currency translation adjustments, net of tax		(1,501)					(1,501)		(1,501)
Share-based compensation, net		22,467		22,467					22,467
Reclassification of stranded tax effect for ASU 2018-02	[1]	319
Reclassification of stranded tax effect for ASU 2018-02 | Accounting Standards Update 2018-02		300			319	[2]	(319)	[2]
Balance (in shares) at Jun. 30, 2018			53,210,627
Balance at Jun. 30, 2018		$ 4,804,841	$ 53	$ 1,346,586	$ 3,397,879		$ (86,865)		$ 4,657,653	$ 147,188

[1] See "Adoption of New Accounting Standards" in 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] See "Adoption of New Accounting Standards" in 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.