Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net and Variable Interest Entities (Variable Interest Entities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Investments in Tax Credit and Other Investments, Net [Line Items]
Fair Value	$ 5,544,658	$ 3,317,214
Collateralized loan obligations (“CLOs”)
Investments in Tax Credit and Other Investments, Net [Line Items]
Fair Value	$ 287,494	$ 284,706

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
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-Section S99
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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-Section 45
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Section 45
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant