Fair Value Measurement - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Fair Value Measurement [Line Items]
Carrying value of debt	$ 342,465	$ 274,752
Restricted investments	18,100	24,300
Fixed-rate Borrowings [Member]
Fair Value Measurement [Line Items]
Increase (decrease) in fair value of debt	11,700
Carrying value of debt	$ 342,500	$ 274,800

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant