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Borrowings (Union Square Construction Financing) (Narrative) (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 08, 2019 | Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 29, 2020
Debt Instrument [Line Items] |  |  |  |  |
(Increase) decrease in prepaid and other assets |  | $ 2,093,000 | $ (2,544,000) |  |
Repayment of long-term borrowings |  | 1,540,000 | $ 42,552,000 |  |
Contractual facility |  | 250,142,000 |  | $ 248,948,000 |
Emerald Creek Capital [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  | 55,000,000.0 |  |  |
Union Square Construction Financing [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  | 57,500,000 |  |  |
Contractual facility |  | $ 55,000,000 |  | $ 55,000,000 |
Maturity date |  | May 06, 2024 |  | May 06, 2024 |
Union Square Construction Financing [Member] | First Mortgage [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  | $ 50,000,000.0 |  |  |
Interest rate |  |  |  |  | 17.50%
Extension period |  | 1 year |  |  |
Union Square Construction Financing [Member] | Mezzanine Loan [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  | $ 7,500,000 |  |  |
Repayment of long-term borrowings | $ 7,500,000 |  |  |  |
Floor Rate [Member] | Emerald Creek Capital [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Spread over LIBOR |  | 7.00% |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Emerald Creek Capital [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Spread over LIBOR |  | 6.90% |  |  |

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