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Notes Payable (Schedule of Long-term Debt) (Details) - USD ($) $ in Thousands | Nov. 18, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Mar. 08, 2017
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Total principal amount |  | $ 400,000 | $ 375,000 |
Unamortized discount and debt issuance costs |  | 1,670 | 2,069 |
Total |  | 398,330 | 372,931 |
Unsecured notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total |  | 373,330 | 372,931 |
Unsecured notes | Unsecured Notes One |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate, stated percentage |  |  |  | 4.40%
Notes payable | Unsecured notes | Unsecured Notes One |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Unsecured debt |  | $ 375,000 | 375,000 | $ 375,000
Interest rate, stated percentage |  | 4.40% |  |
Notes payable | Unsecured notes | Unsecured Notes Two |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Unsecured debt |  | $ 25,000 | $ 0 |
Notes payable | Unsecured notes | Unsecured Notes Two | Minimum | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate | 1.125% |  |  |
Notes payable | Unsecured notes | Unsecured Notes Two | Maximum | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate | 1.50% |  |  |

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