Fair Value Measurement - Loans Held (Details) - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale	$ 28,794	$ 60,232
Loans held-for-investment	28,395	18,228
Total	$ 57,189	$ 78,460

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant