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Investments in Unconsolidated Entities - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended
	Dec. 30, 2019	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Fair value of equity method investment		$ 4,665		$ 6,307
Change in fair value of equity method investment		(18)	$ 47
Gain (loss) on equity method investments carried at fair value		(12)	(105)
Level 3
Schedule of Equity Method Investments [Line Items]
Fair value of equity method investment		4,665		6,307
Distributions		1,660
Change in fair value of equity method investment		18
Investors X
Schedule of Equity Method Investments [Line Items]
Fair value of equity method investment		3,500		5,100
Distributions		1,700
Change in fair value of equity method investment		0
The Hartford
Schedule of Equity Method Investments [Line Items]
Fair value of equity method investment		1,200		1,200
Percentage of ownership interest	2.50%
Equity method investment cost	$ 1,200
Title Insurance Joint Venture
Schedule of Equity Method Investments [Line Items]
Distributions		108	108
Title Insurance Joint Venture | Other Income
Schedule of Equity Method Investments [Line Items]
Gain (loss) on equity method investments carried at fair value		(12)	$ (3)
Title Insurance Joint Venture | Prepaid and Other Assets, Net
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated joint venture		$ 17		$ 29

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