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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Cash Flows [Abstract]      
Accretion of interest on bond $ 15,900 $ 15,600 $ 14,500
Cash and cash equivalents 268,627 127,691 222,123
Restricted cash and short-term deposits (current portion) 77,337 100,361 111,545
Restricted cash (non-current portion) 72,828 62,820 76,744
Cash, cash equivalents, restricted cash and restricted cash equivalents $ 418,792 $ 290,872 $ 410,412