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Long-Term Lease Obligations - Additional Information (Detail) |  | 12 Months Ended
--- | --- | ---
Feb. 28, 2022 USD ($) | Dec. 31, 2023 USD ($) property | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Leases Disclosure [Line Items] |  |  |  |
Rent expense |  | $ 871,300 | $ 824,300 | $ 799,500
Operating lease, right-of-use asset, statement of financial position | Other assets | Other assets |  |
Operating lease, liability, statement of financial position | Other Liabilities | Other Liabilities |  |
Lessor, operating lease, term of contract, additional extended period | 60 months |  |  |
Right-of-use asset | $ 3,800,000 | $ 2,500,000 |  |
Operating lease liability | $ 3,800,000 | $ 2,600,000 |  |
Flagship Center |  |  |  |
Leases Disclosure [Line Items] |  |  |  |
Number of developed parcels | property |  | 2 |  |
90-year Ground Leasehold Interest |  |  |  |
Leases Disclosure [Line Items] |  |  |  |
Ground leasehold interest period |  | 90 years |  |
Minimum annual lease rent over lease term |  | $ 1 |  |
99-year Ground Lease |  |  |  |
Leases Disclosure [Line Items] |  |  |  |
Ground leasehold interest period |  | 99 years |  |
Minimum annual lease rent over lease term |  | $ 1 |  |
Percent of underlying land held under a 99-year ground lease |  | 3.40% |  |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-3 + Details
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