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Share-Based Compensation - Noncash Share-Based Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Class of Stock |  |  |  |
Total noncash share-based compensation expense | $ 2,170 | $ 1,288 | $ 6,068 | $ 3,509
General and administrative expense |  |  |  |
Class of Stock |  |  |  |
Total noncash share-based compensation expense | 1,723 | 938 | 4,741 | 2,520
Property management expenses |  |  |  |
Class of Stock |  |  |  |
Total noncash share-based compensation expense | $ 447 | $ 350 | $ 1,327 | $ 989

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