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Other income (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Component of Operating Income [Abstract]      
Proceeds from unsecured claims $ 635,075 $ 0  
Management fees 15,725 9,701 $ 12,445
Interest and other income 71,774 73,304 53,794
Total other income 722,574 $ 83,005 $ 66,239
Sale proceeds for restructuring claims $ 595,000