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Share-Based Compensation - Noncash Share-Based Compensation Expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Total noncash share-based compensation expense $ 9,834 $ 4,808 $ 3,433
General and administrative expense      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Total noncash share-based compensation expense 6,573 3,466 2,075
Property management expenses      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Total noncash share-based compensation expense 1,745 1,342 1,358
Acquisition and other transaction costs      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Total noncash share-based compensation expense $ 1,516 $ 0 $ 0