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Restructuring Charges (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Mar. 31, 2018 USD ($) | Jan. 30, 2018 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Assets Held-for-sale, Not Part of Disposal Group, Current |  |  |  | $ 3,500 |
Restructuring charges | $ 2,217 | $ 0 | $ 0 |  |
Restructuring and Related Cost, Positions Eliminated [Abstract] |  |  |  |  |
Restructuring and Related Cost, Number of Positions Eliminated | 50 |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring charges | $ 2,217 | 0 | $ 0 |  |
2018 Plan [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges | 3,442 |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Beginning balance | 0 |  |  |  |
Restructuring charges | 3,442 |  |  |  |
Payments for Restructuring | (2,453) |  |  |  |
Restructuring Reserve, Settled without Cash | (670) |  |  |  |
Ending balance | 319 | 0 |  |  |
2018 Plan [Member] | Employee Severance [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges | 2,234 |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Beginning balance | 0 |  |  |  |
Restructuring charges | 2,234 |  |  |  |
Payments for Restructuring | (2,227) |  |  |  |
Restructuring Reserve, Settled without Cash | 0 |  |  |  |
Ending balance | 7 | 0 |  |  |
2018 Plan [Member] | Restructuring Charges [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Beginning balance | 0 |  |  |  |
Restructuring Costs and Asset Impairment Charges | 1,208 |  |  |  |
Payments for Restructuring | (226) |  |  |  |
Restructuring Reserve, Settled without Cash | (670) |  |  |  |
Ending balance | 312 | $ 0 |  |  |
2018 Plan [Member] | Other | Employee Severance [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges | 2,000 |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring charges | 2,000 |  |  |  |
2018 Plan [Member] | Corporate | Employee Severance [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges | 200 |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring charges | $ 200 |  |  |  |
Minimum [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Company estimate of the aggregate restructuring cost |  |  |  |  | $ 2,000
Maximum |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Company estimate of the aggregate restructuring cost |  |  |  |  | $ 5,000

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