Gain on Sale of Assets (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
---|---|---|---|---|---|
Sep. 30, 2018 |
Jun. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||||
Gain on sale of assets | $ (14) | $ 9 | $ (5,113) | $ (79) | |
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | |||||
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||||
Gain on sale of assets | $ (5,100) |