Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
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Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Property, Plant and Equipment [Line Items] | |||
| Property and equipment, net | $ 51,919 | $ 53,359 | |
| Accumulated depreciation | 103,744 | 101,380 | |
| Depreciation and amortization | 8,300 | 8,400 | $ 10,600 |
| Aircraft And Aircraft-Related Equipment | |||
| Property, Plant and Equipment [Line Items] | |||
| Property and equipment, net | 35,200 | 36,900 | |
| Accumulated depreciation | $ 13,400 | $ 11,700 | |
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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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