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Goodwill - (Detail) - Discontinued Operations, Held-for-sale - CES - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 16, 2021 | Dec. 31, 2020
Goodwill [Line Items] |  |  |  |  |  |
Loss on classification as held for sale | $ 325 | $ 0 | $ 325 | $ 0 |  |
Goodwill | $ 1,377 |  | $ 1,377 |  | $ 1,700 | $ 1,702

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