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Commitments and Contingencies (Details) | Dec. 31, 2018 USD ($) lease
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Commitments and Contingencies Disclosure [Abstract] |
Number of non cancelable ground leases | lease | 8
Operating Leases, Future Minimum Payments Due [Abstract] |
2019 | $ 6,811,000
2020 | 6,855,000
2021 | 6,877,000
2022 | 6,888,000
2023 | 6,860,000
Thereafter | 153,258,000
Total future operating lease minimum payments | 187,549,000
Property casualty insurance, deductible per incident, maximum | 5,000,000.0
Pacific Western Insurance LLC [Member] |
Guarantor Obligations [Line Items] |
Investments and Cash | $ 86,600,000

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