Interim Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income before noncontrolling interests	$ 107,880	$ 76,597
Change in cumulative translation gains (losses):
Foreign currency translation gains (losses)	957	(254)
Related tax (expense) benefit	(390)	104
Change in unrealized (losses) gains on available-for-sale securities:
Unrealized holding (losses) gains	(7,757)	170,831
Related tax benefit (expense)	3,136	(69,603)
Reclassification adjustment for (gains) losses included in net income	(608)	746
Related tax expense (benefit)	248	(304)
Amortization of unrealized gains on securities transferred from available-for-sale to held-to-maturity	(1,771)	(2,567)
Related tax benefit	713	1,033
Other comprehensive (loss) income, net of tax	(5,472)	99,986
Comprehensive income	102,408	176,583
Comprehensive (income) loss attributable to noncontrolling interests	(6,397)	2,577
Comprehensive income attributable to SVBFG	$ 96,011	$ 179,160

Available-for-sale Securities, Transferred to Held-to-maturity Securities, Amortization of Unrealized Gains (Losses)

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