Fair Value of Financial Instruments - Additional Information (Details) - Public housing capital fund trusts [Member]	Dec. 31, 2019
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Weighted average effective yield	5.20%
Effective rate - minimum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Effective rate	4.40%
Effective rate - maximum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Effective rate	5.30%