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Stockholders' Equity - Schedule of Reconciliation of Changes in Stockholders' Equity (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2020
Sep. 30, 2019
Schedule of Treasury Stock [Line Items]                
Beginning Balance $ 2,228,873 $ 2,378,893 $ 2,833,620 $ 3,278,311 $ 3,403,369 $ 3,505,423 $ 2,833,620 $ 3,505,423
Beginning Balance (in shares)     269,372,257       269,372,257  
Net loss (112,111) (150,332) $ (434,722) (261,719) (49,447) (28,614) $ (697,165) (339,780)
Foreign currency translation adjustment 218 695 (1,386) 854 848 944 (473) 2,646
Exercise of stock options         9,219     9,219
Stock-based compensation 6,592 4,335 9,160 9,670 11,050 9,338 20,087 30,058
Payment of cash dividends (3,746) (3,735) (7,629) (7,847) (8,344) (8,499) (15,110) (24,690)
Dividend equivalents (69) (73) (125) (160) (126) (110) (267) (396)
Purchase of treasury stock (194) (910) (20,025) (76,123) (88,258) (75,113) (21,129) (239,494)
Ending Balance $ 2,119,563 2,228,873 2,378,893 2,942,986 3,278,311 3,403,369 $ 2,119,563 2,942,986
Ending Balance (in shares) 270,861,290           270,861,290  
Common Stock                
Schedule of Treasury Stock [Line Items]                
Beginning Balance $ 2,706 $ 2,695 $ 2,694 $ 2,688 $ 2,673 $ 2,673 $ 2,694 $ 2,673
Beginning Balance (in shares) 270,569,000 269,523,000 269,372,000 268,791,000 267,353,000 267,316,000 269,372,000 267,316,000
Exercise of stock options         $ 7     $ 7
Exercise of stock options (in shares)         700,000     700,000
Vesting of restricted stock units $ 2 $ 11 $ 1 $ 4 $ 8   $ 14 $ 12
Vesting of restricted stock units (in shares) 292,000 1,046,000 151,000 433,000 739,000 38,000 1,489,000 1,210,000
Forfeitures of restricted stock (in shares)         (1,000) (1,000)   (2,000)
Ending Balance $ 2,708 $ 2,706 $ 2,695 $ 2,692 $ 2,688 $ 2,673 $ 2,708 $ 2,692
Ending Balance (in shares) 270,861,000 270,569,000 269,523,000 269,224,000 268,791,000 267,353,000 270,861,000 269,224,000
Additional Paid-in Capital                
Schedule of Treasury Stock [Line Items]                
Beginning Balance $ 2,889,163 $ 2,884,839 $ 2,875,680 $ 2,856,746 $ 2,836,492 $ 2,827,154 $ 2,875,680 $ 2,827,154
Exercise of stock options         9,212     9,212
Vesting of restricted stock units (2) (11) (1) (4) (8)   (14) (12)
Stock-based compensation 6,592 4,335 9,160 9,670 11,050 9,338 20,087 30,058
Ending Balance 2,895,753 2,889,163 2,884,839 2,866,412 2,856,746 2,836,492 2,895,753 2,866,412
Retained Earnings                
Schedule of Treasury Stock [Line Items]                
Beginning Balance 698,286 852,426 1,294,902 1,658,417 1,716,334 1,753,557 1,294,902 1,753,557
Net loss (112,111) (150,332) (434,722) (261,719) (49,447) (28,614) (697,165) (339,780)
Payment of cash dividends (3,746) (3,735) (7,629) (7,847) (8,344) (8,499) (15,110) (24,690)
Dividend equivalents (69) (73) (125) (160) (126) (110) (267) (396)
Ending Balance 582,360 698,286 852,426 1,388,691 1,658,417 1,716,334 582,360 1,388,691
Accumulated Other Comprehensive Income (Loss)                
Schedule of Treasury Stock [Line Items]                
Beginning Balance 4,787 4,092 5,478 4,279 3,431 2,487 5,478 2,487
Foreign currency translation adjustment 218 695 (1,386) 854 848 944 (473) 2,646
Ending Balance 5,005 4,787 4,092 5,133 4,279 3,431 5,005 5,133
Treasury Stock                
Schedule of Treasury Stock [Line Items]                
Beginning Balance (1,366,069) (1,365,159) (1,345,134) (1,243,819) (1,155,561) (1,080,448) (1,345,134) (1,080,448)
Purchase of treasury stock (194) (910) (20,025) (76,123) (88,258) (75,113) (21,129) (239,494)
Ending Balance $ (1,366,263) $ (1,366,069) $ (1,365,159) $ (1,319,942) $ (1,243,819) $ (1,155,561) $ (1,366,263) $ (1,319,942)