Schedule IV - Changes in Carrying Amount of Mortgage Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract]
Beginning balance	$ 14,699	$ 11,280	$ 30,855
New mortgage loans	21,242	13,943	3,724
Loan repayments	(1,221)	(9,893)	(22,260)
Collection of principal	(426)	(671)	(702)
Mortgage loan allowance for credit losses	19	40	(337)
Ending balance	$ 34,313	$ 14,699	$ 11,280