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Unconsolidated Joint Venture - Additional Information (Detail) - Title Insurance Joint Venture [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]    
Earnings from the unconsolidated joint venture $ 137 $ 53
Collected and recorded distribution from joint venture 89 83
Other Assets, Net [Member]    
Schedule of Equity Method Investments [Line Items]    
Investment in unconsolidated joint venture $ 72 $ 27