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Restructuring and Related Charges - Restructuring liability (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Schedule of restructuring liability |  |  |
Beginning balance | $ 8,781 | $ 11,985 | $ 20,055
Restructuring and other charges | 16,319 | 3,414 | 0
Payments | (4,656) | (7,037) | (6,438)
Adjustments | 443 | 419 | (1,632)
Ending balance | 20,887 | 8,781 | 11,985
Accounts payable and accrued expenses |  |  |
Schedule of restructuring liability |  |  |
Restructuring liabilities | 9,800 | 3,100 |
Lease and Related Costs, Net |  |  |
Schedule of restructuring liability |  |  |
Beginning balance | 8,781 | 11,985 | 20,055
Payments | (2,684) | (3,623) | (6,438)
Adjustments | 443 | 419 | (1,632)
Ending balance | 6,540 | 8,781 | $ 11,985
Severance And Other Employee Separation Costs |  |  |
Schedule of restructuring liability |  |  |
Restructuring and other charges | 16,319 | 3,414 |
Payments | (1,972) | $ (3,414) |
Ending balance | $ 14,347 |  |

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