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Real Estate Securities - Gross Realized Gains and Losses on Sales and Calls of Available for Sale Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Debt Securities, Available-for-sale [Line Items]
Gross realized gains	$ 4,000	$ 7,000	$ 13,000	$ 21,000
Total Realized Gains on Sales and Calls of AFS Securities, net	4,714	7,275	18,227	21,352
Sales
Debt Securities, Available-for-sale [Line Items]
Gross realized gains	3,656	7,275	13,143	21,312
Gross realized losses - sales	0	0	0	(3)
Calls
Debt Securities, Available-for-sale [Line Items]
Gross realized gains	$ 1,058	$ 0	$ 5,084	$ 43

X

- Definition

Available-for-sale Securities, Gross Realized Gain (Loss) On Sales And Calls

+ References

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27357-111563

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27357-111563

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