Employee Compensation and Benefit Plans Expenses Incurred Under Certain Employee Compensation and Benefit Plans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Employee Benefits Disclosure [Line Items]
Incentive Compensation Plans	$ 97,565	$ 78,014	$ 66,232
Direct Drive Incentive Compensation Plan	21,930	20,153	22,941
Retention Program	1,996	1,792	2,577
Warrant Incentive Plan	9,110	3,926	5,818
Deferred Compensation Arrangement with Individual, Compensation Expense	2,404	2,458	2,650
SVBFG 401(k) Plan	13,809	11,996	11,277
SVBFG Employee Stock Ownership Plan	$ 8,585	$ 6,691	$ 7,429