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Credit Enhancement Receivable, Credit Enhancement Deposit and Contingent Liability (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Credit Enhancement Receivable Contingent Liability And Credit Enhancement Deposit
Credit risk loans	$ 24,770,634		$ 24,048,754
Credit Risk
Credit Enhancement Receivable Contingent Liability And Credit Enhancement Deposit
Maximum DB Cayman credit protection	0		18,689
DB Cayman | Credit Risk
Credit Enhancement Receivable Contingent Liability And Credit Enhancement Deposit
Credit risk loans	7,407,660		$ 7,172,509
Maximum DB Cayman credit protection	0	$ 6,230
Maximum loss exposure without any form of credit protection	$ 7,407,660	$ 7,166,279

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- Definition

Concentration risk credit risk financial instrument maximum exposure without credit protection.

+ References

No definition available.

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- Definition

Credit enhancement receivable contingent liability and credit enhancement deposit.

+ References

No definition available.

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- Definition

Maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611

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- Definition

This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2196772

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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248

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