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Long-Term Lease Obligations - Additional Information (Detail) |  | 12 Months Ended
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Feb. 28, 2022 USD ($) | Dec. 31, 2022 USD ($) property | Dec. 31, 2021 USD ($) property | Dec. 31, 2020 USD ($)
Leases Disclosure [Line Items] |  |  |  |
Number of properties subject to noncancelable long-term lease | property |  | 0 | 0 |
Rent expense |  | $ 824,300 | $ 799,500 | $ 799,300
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 | $ 3,200,000 |  |
Operating lease liability | $ 3,800,000 | $ 3,200,000 |  |
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 Lease Expiration Period + References No definition available. + Details
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- Definition Lessee Leasing Arrangements, Number of Properties Under Lease + References No definition available. + Details
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- Definition Lessor, Operating Lease, Term of Contract, Additional Extended Period + References No definition available. + Details
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- Definition Number of Developed Parcels + References No definition available. + Details
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- Definition Percentage of Lease Commitment + References No definition available. + Details
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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 No definition available. + Details
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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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- Definition Indicates line item in statement of financial position that includes operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918631-209977 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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- Definition Indicates line item in statement of financial position that includes operating lease right-of-use asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918631-209977 + Details
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- Details
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