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Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Allowance for Credit Losses [Member] |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Balance at beginning of period |  | $ 38 | $ 38
Charged to costs & expenses | 49 | (38) |
Deductions |  |  |
Balance at end of period | 49 |  | 38
Deferred Tax Asset Valuation Allowance [Member] |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Balance at beginning of period | 50,564 | 45,818 | 48,616
Charged to costs & expenses | 0 | 6,347 | 5,120
Deductions | 45,363 | 1,601 | 7,918
Balance at end of period | $ 5,201 | $ 50,564 | $ 45,818

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