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Basis of Presentation and Significant Accounting Policies (Details) $ in Thousands | Sep. 30, 2019 USD ($) extension_option | Jan. 01, 2019 USD ($) | Dec. 31, 2018 USD ($)
--- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Number of extensions (up to) | extension_option | 2 |  |
Operating lease right-of-use assets | $ 19,890 |  |
Accrued liabilities related to operating leases | 4,501 |  | $ 0
Long-term lease obligation related to operating leases | $ 15,580 |  |
ASU 2016-02 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Operating lease right-of-use assets |  | $ 20,700 |
Accrued liabilities related to operating leases |  | 3,300 |
Long-term lease obligation related to operating leases |  | 17,000 |
ASU 2016-02, assets reclassified into operating lease right of use assets |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Operating lease right-of-use assets |  | 2,500 |
ASU 2016-02, liabilities reclassified into operating lease right of use assets |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Operating lease right-of-use assets |  | $ 2,300 |
Minimum |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Term of lease option to extend | 3 years |  |
Maximum |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Term of lease option to extend | 5 years |  |

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- Definition Term of lessee's operating lease renewal, 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, 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 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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