Revenue Recognition on Construction Contract and Other Service Revenues (Details) - Construction Contract Revenue $ in Thousands |
3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2018
USD ($)
compensation_arrangement
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Sep. 30, 2017
USD ($)
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Sep. 30, 2018
USD ($)
compensation_arrangement
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Sep. 30, 2017
USD ($)
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| Disaggregation of Revenue [Line Items] | ||||
| Number of compensation arrangement types | compensation_arrangement | 3 | 3 | ||
| Performance obligations satisfied or already satisfied | $ (1) | $ 47 | $ 318 | $ 594 |
| Customers payment period | 30 days | |||
| Remaining performance obligations | 13,700 | $ 13,700 | ||
| Remaining performance obligation expected to be recognized during the remainder of year | $ 8,000 | $ 8,000 | ||
| X | ||||||||||
- Definition Revenue, Remaining Performance Obligation, Amount to be Recognized During the Remainder of the Year No definition available.
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| X | ||||||||||
- Definition Revenue from Contract with Customer, Construction Contracts, Number of Compensation Arrangement Types No definition available.
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| X | ||||||||||
- Definition Revenue from Contract with Customer, Payment Period No definition available.
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| X | ||||||||||
- Definition Amount of revenue recognized from performance obligation satisfied or partially satisfied in previous reporting periods. Includes, but is not limited to, change in transaction price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Details
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