Related Party Transactions - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Related Party Transaction [Line Items]
Company contribution to a multi employer 401K plan at discretionary amount of employee's cash compensation, maximum percentage	6.00%	6.00%	6.00%
Company contribution to a multi employer 401K plan at discretionary amount of employee's cash compensation, amount	$ 425,300	$ 387,700	$ 404,300
Deferred compensation, employee contribution, percentage	2.00%
Deferred compensation, employer contribution, percentage	3	3	3
Deferred compensation, company contribution, amount	$ 390,400	$ 337,900	$ 238,400
Deferred compensation, cumulative unfunded liability	3,300,000	3,000,000
Ancillary costs and expenses	10,600,000	9,600,000	8,000,000
Accounts payable, accrued expenses and other liabilities	57,022,000	42,978,000
Insurance commissions and fees expense	562,800	286,900	$ 397,900
Shared Services Agreement | Related Party
Related Party Transaction [Line Items]
Accounts payable, accrued expenses and other liabilities	$ 1,100,000	$ 1,200,000