XML 48 R30.htm IDEA: XBRL DOCUMENT v3.20.4
Schedule II- Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II- Valuation and Qualifying Accounts VALUATION AND QUALIFYING ACCOUNTS
(in thousands)

Description
Balance at
Beginning of
Year
Provision (Benefit)
for
Credit Losses
Write-offs,
Net of
Recoveries
Balance at
End of Year
Allowance for credit losses:
2020$39,317 64,375 (3,363)$100,329 
2019$32,694 21,898 (15,275)$39,317 
2018$30,600 6,527 (4,433)$32,694 
Description
Balance at
Beginning of
Year
AdditionsDeductions
Balance at
End of Year
Deferred income tax asset valuation allowance:
2020$2,759,431 264,366 (37,113)$2,986,684 
2019$2,643,899 147,881 (32,349)$2,759,431 
2018$3,390,467 201,282 (947,850)$2,643,899