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Basis of Presentation - Recently Adopted Accounting Standards (Details) - USD ($) $ in Thousands | Jan. 01, 2019 | Sep. 30, 2019
--- | --- | ---
Accounting Changes |  |
Lease, Practical Expedients, Package | true |
Operating lease right-of-use assets |  | $ 10,472
Operating lease liability |  | $ 10,796
ASU 2016-02 |  |
Accounting Changes |  |
Change in Accounting Principle, Accounting Standards Update, Adopted | true |
ASU 2016-02 | Adjustment |  |
Accounting Changes |  |
Operating lease right-of-use assets | $ 14,200 |
Operating lease liability | $ 14,200 |

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- Definition Indicates (true false) whether practical expedients are elected for not reassessing whether any expired or existing contract is or contains lease, lease classification for expired or existing lease, and initial direct cost for any existing lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 10 -Section 65 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=119364159&loc=SL77916155-209984 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 10 -Section 65 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=119364159&loc=SL77916155-209984 + Details
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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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