Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2017

Banking and Thrift [Abstract]

Capital Ratios for Company and Bank under Federal Regulatory Guidelines, Compared to Minimum Regulatory Capital Requirements for Adequately Capitalized and Well Capitalized Depository Institution

The following table presents the capital ratios for the Company and the Bank under federal regulatory guidelines, compared to the minimum regulatory capital requirements for an adequately capitalized and a well-capitalized depository institution, as of December 31, 2017 and 2016:

	Capital Ratios						Capital Amounts
(Dollars in thousands)	Actual		Well Capitalized Minimum		Adequately Capitalized Minimum		Actual		Well Capitalized Minimum		Adequately Capitalized Minimum
December 31, 2017:
CET 1 risk-based capital:
SVB Financial	12.78	%	6.5	%	4.5	%	$	4,182,315	$	2,127,902	$	1,473,163
Bank	12.06		6.5		4.5		3,787,988		2,041,227		1,413,157
Tier 1 risk-based capital:
SVB Financial	12.97		8.0		6.0		4,246,606		2,618,957		1,964,218
Bank	12.06		8.0		6.0		3,787,988		2,512,279		1,884,209
Total risk-based capital:
SVB Financial	13.96		10.0		8.0		4,571,542		3,273,696		2,618,957
Bank	13.04		10.0		8.0		4,094,782		3,140,349		2,512,279
Tier 1 leverage:
SVB Financial	8.34		N/A		4.0		4,246,606		N/A		2,036,138
Bank	7.56		5.0		4.0		3,787,988		2,504,636		2,003,709
December 31, 2016:
CET 1 risk-based capital:
SVB Financial	12.80	%	6.5	%	4.5	%	$	3,616,404	$	1,836,169	$	1,271,194
Bank	12.65		6.5		4.5		3,397,232		1,745,695		1,208,558
Tier 1 risk-based capital:
SVB Financial	13.26		8.0		6.0		3,744,605		2,259,900		1,694,925
Bank	12.65		8.0		6.0		3,397,232		2,148,548		1,611,411
Total risk-based capital:
SVB Financial	14.21		10.0		8.0		4,015,236		2,824,875		2,259,900
Bank	13.66		10.0		8.0		3,667,709		2,685,685		2,148,548
Tier 1 leverage:
SVB Financial	8.34		N/A		4.0		3,744,605		N/A		1,796,387
Bank	7.67		5.0		4.0		3,397,232		2,214,467		1,771,574