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Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Operating leases: |  |  |
Operating lease right-of-use assets | $ 60,149 | $ 60,600 | $ 0
Accrued liabilities and other | 12,659 | 12,000 |
Operating lease liabilities | 49,632 | $ 50,700 | $ 0
Total operating lease liabilities | 62,291 |  |
Finance leases: |  |  |
Property, plant and equipment | 875 |  |
Accumulated depreciation | (664) |  |
Net property, plant and equipment | 211 |  |
Accrued liabilities and other | 147 |  |
Other liabilities | 48 |  |
Total finance lease liabilities | $ 195 |  |

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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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