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Combined Guarantor Subsidiaries - Revenues - Contract Balances (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2019
Change in Contract with Customer, Liability [Roll Forward] |  |
Contract liability | $ 265 |
Completed performance obligation | (4) |
Contract obligation | 0 |
Contract liability | 261 |
Contract with Customer, Liability [Abstract] |  |
Contract liability | 265 | $ 261
Expected Settlement Period |  |
2019 |  | (99)
2020 |  | (54)
2021 |  | (54)
2022 |  | (54)
Guarantor Subsidiaries |  |
Change in Contract with Customer, Liability [Roll Forward] |  |
Contract liability | 79 |
Completed performance obligation | 0 |
Contract obligation | 0 |
Contract liability | 79 |
Contract with Customer, Liability [Abstract] |  |
Contract liability | $ 79 | 79
Expected Settlement Period |  |
2019 |  | (19)
2020 |  | (20)
2021 |  | (20)
2022 |  | $ (20)

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- Definition Change in Contract with Customer, Liability [Roll Forward] + References No definition available. + Details
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- Definition Contract With Customer, Liability, Revenue Recognition [Abstract] + References No definition available. + Details
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- Definition Contract with Customer, Liability, Contract Obligations Added during Period + References No definition available. + Details
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- Definition Contract with Customer, Liability, Expected Revenue Recognized, Year Four + References No definition available. + Details
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- Definition Contract with Customer, Liability, Expected Revenue Recognized, Year Three + References No definition available. + Details
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- Definition Contract with Customer, Liability, Expected Revenue Recognized, Year Two + References No definition available. + Details
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130532-203044 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045 + Details
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- References No definition available. + Details
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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045 + Details
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- Details
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