The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Segment Reporting - Segment Information (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Goodwill	$ 137,823		$ 137,823		$ 0
Operating segments \| Global Commercial Bank
Segment Reporting Information [Line Items]
Depreciation and amortization	5,100	$ 5,500	14,800	$ 16,600
Operating segments \| SVB Leerink
Segment Reporting Information [Line Items]
Goodwill	$ 137,800		$ 137,800