Valuation and Qualifying Accounts (Detail) - Allowance for Doubtful Accounts - USD ($) $ in Thousands |
12 Months Ended | ||||
---|---|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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Valuation And Qualifying Accounts Disclosure [Line Items] | |||||
Beginning Balance | $ 2,312 | $ 2,323 | $ 3,191 | ||
Charged to Costs and Expenses | 5,683 | ||||
Deductions | [1] | (1,479) | (11) | (868) | |
Ending Balance | $ 6,516 | $ 2,312 | $ 2,323 | ||
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