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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Allowances for doubtful accounts on current receivables $ 49,749 $ 16,546
Accumulated depreciation on property and equipment 1,503,498 1,372,132
Accumulated amortization on other intangible assets $ 682,498 $ 517,574
Treasury stock, common shares (in shares) 25,912,579 24,410,601
Common Stock    
Common stock, par value (in dollars per share) $ 0.00001 $ 0.00001
Common stock, shares authorized (in shares) 600,000,000 600,000,000
Common stock, shares issued (in shares) 168,546,513 162,710,792
Common stock, shares outstanding (in shares) 142,633,934 138,300,191