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Shareholders' Equity (Deficit) - Schedule of Company's Common Stock Repurchases Made on Open Market (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Equity, Class of Treasury Stock [Line Items]    
Dollar Value of Shares Repurchased $ 134,340 $ 325,699
Open Market Purchases of Common Stock [Member]    
Equity, Class of Treasury Stock [Line Items]    
Average Price Paid Per Share $ 407.70 $ 248.65
Total Number of Shares Repurchased 330 1,310
Dollar Value of Shares Repurchased $ 134,340 $ 325,699