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Unconsolidated Joint Venture - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Change in fair value			$ (114)	$ (9)
Distributions from equity method investments carried at fair value			1,322	100
Title Insurance Joint Venture
Schedule of Equity Method Investments [Line Items]
Change in fair value	$ 1	$ 48	16	115
Distributions from equity method investments carried at fair value	22	10	130	124
Title Insurance Joint Venture | Other Income
Schedule of Equity Method Investments [Line Items]
Change in fair value	1	$ 48	16	$ 115
Title Insurance Joint Venture | Prepaid and Other Assets, Net
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated joint venture	$ 11		$ 11		$ 125

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