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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jan. 01, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Summary Of Significant Accounting Policy [Line Items] |  |  |  |  |  |
Life insurance proceeds received |  |  |  |  |  | $ 1,000
Tax benefit in other comprehensive income (loss) |  | $ 218 |  | $ 104 | $ 321 | 224
ASU 2018-15 [Member] | Reclassification of Property, Plant and Equipment to Other Assets [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |  |  |  |
Effect on adoption of ASU | $ 5,600 |  |  |  |  |
Adjustments for New Accounting Principle, Early Adoption [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |  |  |  |
Tax benefit in other comprehensive income (loss) |  |  |  |  | $ (100) |
Excess, Obsolete Inventory Reserve and Cost of Goods [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |  |  |  |
Amount of revision |  |  |  | 800 |  | $ 200
Errors in Operating Activity [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |  |  |  |
Amount of revision |  |  |  | $ 1,000 |  |
Overstatement Long-term Investment Balance at Remeasured Cost Basis [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |  |  |  |
Amount of revision |  |  | $ 2,800 |  |  |
Errors in Net Investment Gain [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |  |  |  |
Amount of revision |  |  | $ 1,500 |  |  |

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