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Commitments and Contingencies (Details) - USD ($) $ in Thousands	Jun. 28, 2018	Dec. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Total damages including punitive	$ 70,000
Damages sought by plaintiff	$ 700,000
Unfunded loan commitments		$ 1,095,598	$ 435,627
Commercial Mortgage and Subordinated Portfolio Segment [Member]
Schedule of Equity Method Investments [Line Items]
Unfunded loan commitments		$ 1,100,000

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Loss Contingency, Damages Sought, Loss On Investment, Value

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The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
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