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Leases - Additional Information (Detail) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2019 USD ($) | Dec. 31, 2019 USD ($) Facility | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Lessee Lease Description [Line Items] |  |  |  |
Operating leasing arrangements initial term | 58 months | 58 months |  |
Proceeds from sale of facility | $ 10,200,000 |  |  |
Gain on sale of facility |  | $ 13,904,000 | $ 28,958,000 | $ 33,510,000
Right of use asset | 31,275,000 | 31,275,000 |  |
Operating lease liabilities | 36,579,000 | $ 36,579,000 |  |
New Facility Lease |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |
Number of facility leases | Facility |  | 3 |  |
Right of use asset | 3,800,000 | $ 3,800,000 |  |
Operating lease liabilities | 3,800,000 | $ 3,800,000 |  |
Extended Facility Lease |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |
Number of facility leases | Facility |  | 9 |  |
Right of use asset | 7,100,000 | $ 7,100,000 |  |
Operating lease liabilities | 7,100,000 | $ 7,100,000 |  |
Other Operating Expenses (Income), Net |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |
Gain on sale of facility | $ 800,000 |  |  |
Minimum |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |
Operating leasing arrangements initial term | 1 year | 1 year |  |
Leases remaining lease terms |  | 1 month |  |
Maximum |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |
Leases remaining lease terms |  | 9 years |  |

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- Definition Number of leased facilities. + References No definition available. + Details
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: 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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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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