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Summary of Long Lived Asset Impairment Evaluations Performed by Assets Classification (Detail) | 3 Months Ended
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Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020
Goodwill |  |  |  |
Impaired Long Lived Assets Held And Used [Line Items] |  |  |  |
Long lived assets imapirement, Valuation Multiple |  |  | N/A |
Goodwill | Market Approach |  |  |  |
Impaired Long Lived Assets Held And Used [Line Items] |  |  |  |
Long lived assets imapirement, Valuation Multiple | 3.1 to 7 times | 2.9 to 7 times |  | 8 times
Tradename Intangible Assets |  |  |  |
Impaired Long Lived Assets Held And Used [Line Items] |  |  |  |
Long lived assets imapirement, Valuation Multiple |  |  | N/A |
Tradename Intangible Assets | Income Approach |  |  |  |
Impaired Long Lived Assets Held And Used [Line Items] |  |  |  |
Long lived assets imapirement, Valuation Multiple | N/A | N/A |  | N/A
Other long-lived assets |  |  |  |
Impaired Long Lived Assets Held And Used [Line Items] |  |  |  |
Long lived assets imapirement, Valuation Multiple |  |  | N/A |
Other long-lived assets | Market Approach |  |  |  |
Impaired Long Lived Assets Held And Used [Line Items] |  |  |  |
Long lived assets imapirement, Valuation Multiple | 3.1 to 6 times | 3.2 to 6 times |  | 6 times

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