Severance and Restructuring (Components of and Changes in Severance and Restructuring Accruals) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Restructuring Cost and Reserve [Line Items] | |||
Provision | $ 383 | $ 2,550 | |
Employee Termination Costs [Member] | |||
Restructuring Cost and Reserve [Line Items] | |||
Balance | $ 562 | 1,326 | |
Provision | 647 | 1,038 | |
Utilization | (1,129) | (1,802) | |
Balance | 80 | 562 | 1,326 |
Restructuring and Other [Member] | |||
Restructuring Cost and Reserve [Line Items] | |||
Balance | 1,077 | 1,786 | |
Provision | 564 | 627 | |
Utilization | (1,056) | (1,336) | |
Balance | $ 585 | $ 1,077 | $ 1,786 |