Goodwill and Other Intangible Assets - Goodwill, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Aug. 01, 2019	Dec. 31, 2018
Goodwill, net
Goodwill	$ 1,299,878	$ 1,145,121	$ 154,757
Consumer Banking
Goodwill, net
Goodwill	764,389	$ 522,000	141,246
Wholesale Banking
Goodwill, net
Goodwill	$ 535,489		$ 13,511

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant