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Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Valuation Allowance for Deferred Tax Assets [Member]      
Valuation And Qualifying Accounts Disclosure [Line Items]      
Valuation allowance, Beginning balance [1] $ 48,037 $ 50,519 $ 49,748
Valuation allowance, Additions/Charges to Expense [1]     2,146
Valuation allowance, Deductions/ Other [1] (3,038) (2,482) (1,375)
Valuation allowance, Ending balance [1] 44,999 48,037 50,519
Valuation Allowance for Accounts Receivable [Member]      
Valuation And Qualifying Accounts Disclosure [Line Items]      
Valuation allowance, Beginning balance 24,836 22,534 23,142
Valuation allowance, Additions/Charges to Expense 43,470 32,042 27,571
Valuation allowance, Deductions/ Other (36,342) (29,740) (28,179)
Valuation allowance, Ending balance $ 31,964 $ 24,836 $ 22,534
[1] Amounts include both continuing and discontinued operations gross deferred tax balances.