Overview (Details)  | 
6 Months Ended | 
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 Jun. 30, 2019  
segment 
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| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Number of segments | 2 | 
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. No definition available. 
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- References No definition available. 
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