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Other non-current assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Other non-current assets    
Right-of-use assets $ 118,972 $ 116,503
Tax receivable 9,830 11,050
Loans receivable 3,907 4,870
Deferred debt issue costs 5,516 2,263
Other 11,594 12,922
Other non-current assets $ 149,819 $ 147,608