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Leases - Schedule of Company's right-of-use lease assets and lease liabilities (Detail) - USD ($) $ in Thousands | Sep. 28, 2019 | Jan. 01, 2019
--- | --- | ---
Assets: |  |
Total lease assets | $ 85,112 | $ 100,000
Liabilities: |  |
Operating lease liabilities - current | 23,936 |
Operating lease liabilities - long-term | 61,372 |
Total lease liabilities | 85,308 | $ 100,000
Current operating lease liabilities [Member] |  |
Liabilities: |  |
Operating lease liabilities - current | 23,936 |
Long-term operating lease liabilities [Member] |  |
Liabilities: |  |
Operating lease liabilities - long-term | 61,372 |
Property Operating lease assets [Member] |  |
Assets: |  |
Total lease assets | 57,028 |
Automobile Operating lease assets [Member] |  |
Assets: |  |
Total lease assets | 26,122 |
Equipment operating lease assets [Member] |  |
Assets: |  |
Total lease assets | $ 1,962 |

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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 Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + 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 Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. + 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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