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Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Summary Of Significant Accounting Policies [Line Items]
Maturity period of highly liquid debt instruments	3 months
Loans past due, minimum period	90 days
Loans receivable	$ 26,208	$ 30,893
Accrued interest, before allowance for credit loss	4,400
Allowance for credit loss	$ 48,600
Computer Software And Equipment
Summary Of Significant Accounting Policies [Line Items]
Estimated depreciable life of assets (years)	3 years
Furniture, Fixtures and Other Electronic Equipment
Summary Of Significant Accounting Policies [Line Items]
Estimated depreciable life of assets (years)	5 years
Building Improvements
Summary Of Significant Accounting Policies [Line Items]
Estimated depreciable life of assets (years)	10 years
Buildings
Summary Of Significant Accounting Policies [Line Items]
Estimated depreciable life of assets (years)	30 years

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