XML 70 R108.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Movement in Valuation Allowances And Reserves [Roll Forward]      
Balance at Beginning of Period $ 90,775 $ 92,571 $ 97,920
Provision for Doubtful Accounts 39,270 39,762 20,603
Write-offs, Net of Recoveries (35,484) (41,558) (25,952)
Balance at End of Period 94,561 90,775 92,571
Deferred income tax valuation allowance [Member]      
Movement in Valuation Allowances And Reserves [Roll Forward]      
Balance at Beginning of Period 2,477,703 2,513,738 2,583,274
Increase 96,353 0 0
Decrease 0 (36,035) (69,536)
Balance at End of Period $ 2,574,056 $ 2,477,703 $ 2,513,738