Loans Receivable and Allowance for Credit Losses (Non-PCI TDR Modifications) (Details) $ in Thousands	3 Months Ended
Mar. 31, 2019 USD ($)
Non-PCI Loans \| Commercial lending \| Commercial and industrial (“C&I”)
Financing Receivable, Modifications [Line Items]
Post- Modification Outstanding Recorded Investment	$ 29,176

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration