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Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Statement of changes in equity [abstract]      
Income tax relating to cash flow hedges included in other comprehensive income $ 5,729 $ 6,752 $ 11,322
Income tax relating to changes in revaluation surplus included in other comprehensive income 11,790 10,480 $ 139,223
Income tax relating to changes in revaluation surplus derived from disposal of assets included in other comprehensive income $ 3,458    
Income tax relating to grants of other equity instruments   $ 2,978