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Commitments and Contingencies - Lease Liabilities (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
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Commitments and Contingencies Disclosure [Abstract] |  |  |
Current portion included in accrued and other current liabilities | $ 1,807 | $ 1,679 |
Long-term portion of lease liabilities | 51,536 | 51,349 | [1]
Total operating lease liabilities | $ 53,343 | $ 53,028 |
[1] | The balance sheet as of December 31, 2019 is derived from the audited financial statements as of that date.

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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 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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