Fair Value Measurement - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Fair Value Measurement [Line Items]
Carrying value of debt	$ 319,864	$ 274,752
Restricted investments	16,900	24,300
Fixed-rate Borrowings [Member]
Fair Value Measurement [Line Items]
Increase (decrease) in fair value of debt	11,700
Carrying value of debt	$ 319,900	$ 274,800