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Summary of Significant Accounting Policies - Additional Information (Details) | 9 Months Ended
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Sep. 30, 2018 USD ($) Segments
Summary Of Significant Accounting Policies [Line Items] |
Number of reportable segments | Segments | 3
Operating Lease Commitments |
Summary Of Significant Accounting Policies [Line Items] |
Contractual obligation | $ | $ 21,863,000

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- Definition Summary of significant accounting policies. + References No definition available. + Details
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- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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