XML 96 R82.htm IDEA: XBRL DOCUMENT v3.20.4
Valuation And Qualifying Accounts (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Allowance for Credit Losses      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at the beginning of the period $ 1,637 $ 5,489 $ 4,190
Additions [1] 1,550 124 1,912
Deduction (427) (3,976) (613)
Balance at the end of the period 2,760 1,637 5,489
Valuation Allowance of Deferred Tax Assets      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at the beginning of the period 2,130 1,507 1,015
Additions [1] 10 633 492
Deduction (881) (10) 0
Balance at the end of the period $ 1,259 $ 2,130 $ 1,507
[1] Reductions in/charges to revenues and expenses.