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Stockholders' Equity - Schedule of Reconciliation of Changes in Stockholders' Equity (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2020
Jun. 30, 2019
Schedule of Treasury Stock [Line Items]            
Beginning Balance $ 2,378,893 $ 2,833,620 $ 3,403,369 $ 3,505,423 $ 2,833,620 $ 3,505,423
Beginning Balance (in shares)   269,372,257     269,372,257  
Net loss (150,332) $ (434,722) (49,447) (28,614) $ (585,054) (78,061)
Foreign currency translation adjustment 695 (1,386) 848 944 (691) 1,792
Exercise of stock options     9,219     9,219
Stock-based compensation 4,335 9,160 11,050 9,338 13,495 20,388
Payment of cash dividends (3,735) (7,629) (8,344) (8,499) (11,364) (16,843)
Dividend equivalents (73) (125) (126) (110) (198) (236)
Purchase of treasury stock (910) (20,025) (88,258) (75,113) (20,935) (163,371)
Ending Balance $ 2,228,873 2,378,893 3,278,311 3,403,369 $ 2,228,873 3,278,311
Ending Balance (in shares) 270,569,043       270,569,043  
Common Stock            
Schedule of Treasury Stock [Line Items]            
Beginning Balance $ 2,695 $ 2,694 $ 2,673 $ 2,673 $ 2,694 $ 2,673
Beginning Balance (in shares) 269,523,000 269,372,000 267,353,000 267,316,000 269,372,000 267,316,000
Exercise of stock options     $ 7     $ 7
Exercise of stock options (in shares)     700,000     700,000
Vesting of restricted stock units $ 11 $ 1 $ 8   $ 12 $ 8
Vesting of restricted stock units (in shares) 1,046,000 151,000 739,000 38,000 1,197,000 777,000
Forfeitures of restricted stock (in shares)     (1,000) (1,000)   (2,000)
Ending Balance $ 2,706 $ 2,695 $ 2,688 $ 2,673 $ 2,706 $ 2,688
Ending Balance (in shares) 270,569,000 269,523,000 268,791,000 267,353,000 270,569,000 268,791,000
Additional Paid-in Capital            
Schedule of Treasury Stock [Line Items]            
Beginning Balance $ 2,884,839 $ 2,875,680 $ 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 (11) (1) (8)   (12) (8)
Stock-based compensation 4,335 9,160 11,050 9,338 13,495 20,388
Ending Balance 2,889,163 2,884,839 2,856,746 2,836,492 2,889,163 2,856,746
Retained Earnings            
Schedule of Treasury Stock [Line Items]            
Beginning Balance 852,426 1,294,902 1,716,334 1,753,557 1,294,902 1,753,557
Net loss (150,332) (434,722) (49,447) (28,614) (585,054) (78,061)
Payment of cash dividends (3,735) (7,629) (8,344) (8,499) (11,364) (16,843)
Dividend equivalents (73) (125) (126) (110) (198) (236)
Ending Balance 698,286 852,426 1,658,417 1,716,334 698,286 1,658,417
Accumulated Other Comprehensive Income (Loss)            
Schedule of Treasury Stock [Line Items]            
Beginning Balance 4,092 5,478 3,431 2,487 5,478 2,487
Foreign currency translation adjustment 695 (1,386) 848 944 (691) 1,792
Ending Balance 4,787 4,092 4,279 3,431 4,787 4,279
Treasury Stock            
Schedule of Treasury Stock [Line Items]            
Beginning Balance (1,365,159) (1,345,134) (1,155,561) (1,080,448) (1,345,134) (1,080,448)
Purchase of treasury stock (910) (20,025) (88,258) (75,113) (20,935) (163,371)
Ending Balance $ (1,366,069) $ (1,365,159) $ (1,243,819) $ (1,155,561) $ (1,366,069) $ (1,243,819)