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Debt - Scheduled Principal Repayments - Additional Information (Details)
$ in Thousands
Jun. 30, 2021
USD ($)
Debt Instrument [Line Items]  
Contractual due 2021 $ 212,969
Contractual due 2022 529,299
Contractual due 2023 59,361
Debt With Extension Options  
Debt Instrument [Line Items]  
Contractual due 2021 172,400
Contractual due 2022 179,400
Contractual due 2023 $ 41,500