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Leases - Summary of Balance Sheet Classifications of Operating and Finance Leases (Detail) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Operating Leases: |  |
Operating lease right-of-use assets | $ 498,233 |
Current operating lease liabilities | 50,776 |
Noncurrent operating lease liabilities | 446,128 |
Total operating lease liabilities | 496,904 |
Finance Leases: |  |
Property, plant and equipment | 11,143 |
Accumulated depreciation | (935) |
Property, plant and equipment, net | 10,208 |
Other current liabilities | 3,456 | $ 3,249
Other noncurrent liabilities | 7,862 | 7,630
Total finance lease liabilities | $ 11,318 | $ 10,879

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980 Reference 2: 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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