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Restructuring Charges (Schedule Of Accrued Restructuring Balances) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | $ 3,956 | $ 1,335 |
Restructuring charges | 12,900 | 8,507 |
Cash Payment | (9,715) | (4,931) |
Non-Cash Activity | (2,687) | (944) |
Foreign Exchange Adjustments |  | (11) |
Ending Balance | 4,454 | 3,956 | $ 1,335
2020 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 9,069 |  |
Cash Payment | (4,384) |  |
Non-Cash Activity | (742) |  |
Ending Balance | 3,943 |  |
2019 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | 3,956 |  |
Restructuring charges | 3,831 | 8,046 |
Cash Payment | (5,331) | (3,146) |
Non-Cash Activity | (1,945) | (944) |
Ending Balance | 511 | 3,956 |
2018 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance |  | 1,200 |
Restructuring charges |  | 461 | 4,588
Cash Payment |  | (1,661) |
Ending Balance |  |  | 1,200
2017 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance |  | 135 |
Cash Payment |  | (124) |
Foreign Exchange Adjustments |  | (11) |
Ending Balance |  |  | 135
Severance [Member] | 2020 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 8,171 |  |
Cash Payment | (4,182) |  |
Non-Cash Activity | (232) |  |
Ending Balance | 3,757 |  |
Severance [Member] | 2019 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | 3,956 |  |
Restructuring charges | (1,161) | 6,449 |
Cash Payment | (2,484) | (2,493) |
Non-Cash Activity | (72) |  |
Ending Balance | 239 | 3,956 |
Severance [Member] | 2018 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance |  | 282 |
Cash Payment |  | (282) |
Ending Balance |  |  | 282
Lease Facility Costs [Member] | 2020 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 165 |  |
Non-Cash Activity | (127) |  |
Ending Balance | 38 |  |
Lease Facility Costs [Member] | 2019 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 3,551 |  |
Cash Payment | (2,394) |  |
Non-Cash Activity | (1,145) |  |
Ending Balance | 12 |  |
Other Exit Costs [Member] | 2020 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 733 |  |
Cash Payment | (202) |  |
Non-Cash Activity | (383) |  |
Ending Balance | 148 |  |
Other Exit Costs [Member] | 2019 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 1,441 | 1,597 |
Cash Payment | (453) | (653) |
Non-Cash Activity | (728) | (944) |
Ending Balance | $ 260 |  |
Other Exit Costs [Member] | 2018 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance |  | 918 |
Restructuring charges |  | 461 |
Cash Payment |  | (1,379) |
Ending Balance |  |  | 918
Other Exit Costs [Member] | 2017 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance |  | 135 |
Cash Payment |  | (124) |
Foreign Exchange Adjustments |  | $ (11) |
Ending Balance |  |  | $ 135

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