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Depreciation and Amortization - Depreciation and Amortization Expense for Property and Equipment and Intangible Assets (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Property, Plant and Equipment [Line Items] |  |  |  |
Total depreciation and amortization expense | $ 5,634 | $ 5,852 | $ 16,610 | $ 17,528
Operating Expenses [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Total depreciation and amortization expense | 5,599 | 5,794 | 16,505 | 17,301
Corporate General and Administrative Expenses [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Total depreciation and amortization expense | $ 35 | $ 58 | $ 105 | $ 227

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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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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. + References No definition available. + Details
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