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Loans Held for Sale - Narrative (Details) - USD ($) $ in Thousands		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Receivables Held-for-sale [Abstract]
Transfer of multi-family loans held for sale to held for investment	$ 401,100	$ 401,144	$ 0
Loans held-for-sale (including nonperforming loans)	$ 19,700	$ 19,700		$ 1,300

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- Definition

Loans Held-for-Sale (Including Nonperforming Loans)

+ References

No definition available.

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- References

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- Definition

Value of loans held-for-sale transferred to loans held in the entity's portfolio in noncash transactions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
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