Other Financial Statement Information - Property, Plant and Equipment - Net (Detail) - USD ($) $ in Thousands |
Mar. 31, 2020 |
Dec. 31, 2019 |
---|---|---|
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment - Gross | $ 285,128 | $ 294,710 |
Less accumulated depreciation | (165,772) | (170,692) |
Property, plant and equipment - Net | 119,356 | 124,018 |
Land and Improvements [Member] | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment - Gross | 20,519 | 22,218 |
Buildings and Improvements [Member] | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment - Gross | 80,885 | 82,811 |
Machinery, Equipment and Aircraft [Member] | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment - Gross | 172,777 | 180,221 |
Construction in Progress [Member] | ||
Property, Plant and Equipment [Line Items] | ||
Property, plant and equipment - Gross | $ 10,947 | $ 9,460 |