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Restructuring Charges (Schedule Of Accrued Restructuring Balances) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | $ 1,335 | $ 290 |
Restructuring charges | 8,507 | 5,197 |
Cash Payment | (4,931) | (4,012) |
Non-Cash Activity | (944) | (116) |
Foreign Exchange Adjustments | (11) | (24) |
Ending Balance | 3,956 | 1,335 | $ 290
2019 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | 0 |  |
Restructuring charges | 8,046 |  |
Cash Payment | (3,146) |  |
Non-Cash Activity | (944) |  |
Foreign Exchange Adjustments | 0 |  |
Ending Balance | 3,956 | 0 |
2018 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | 1,200 | 0 |
Restructuring charges | 461 | 4,588 |
Cash Payment | (1,661) | (3,388) |
Non-Cash Activity | 0 | 0 |
Foreign Exchange Adjustments | 0 | 0 |
Ending Balance | 0 | 1,200 | 0
2017 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | 135 | 245 |
Restructuring charges | 0 | 369 | 2,967
Cash Payment | (124) | (455) |
Non-Cash Activity | 0 | 0 |
Foreign Exchange Adjustments | (11) | (24) |
Ending Balance | 0 | 135 | 245
2016 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | 0 | 45 |
Restructuring charges |  | 240 |
Cash Payment |  | (169) |
Non-Cash Activity |  | (116) |
Foreign Exchange Adjustments |  | 0 |
Ending Balance |  | 0 | 45
Severance [Member] | 2019 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | 0 |  |
Restructuring charges | 6,449 |  |
Cash Payment | (2,493) |  |
Non-Cash Activity | 0 |  |
Foreign Exchange Adjustments | 0 |  |
Ending Balance | 3,956 | 0 |
Severance [Member] | 2018 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | 282 | 0 |
Restructuring charges | 0 | 2,815 |
Cash Payment | (282) | (2,533) |
Non-Cash Activity | 0 | 0 |
Foreign Exchange Adjustments | 0 | 0 |
Ending Balance | 0 | 282 | 0
Severance [Member] | 2017 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | 0 | 47 |
Restructuring charges | 0 | 3 |
Cash Payment | 0 | (50) |
Non-Cash Activity | 0 | 0 |
Foreign Exchange Adjustments | 0 | 0 |
Ending Balance | 0 | 0 | 47
Severance [Member] | 2016 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | 0 | 29 |
Restructuring charges |  | (6) |
Cash Payment |  | (23) |
Non-Cash Activity |  | 0 |
Foreign Exchange Adjustments |  | 0 |
Ending Balance |  | 0 | 29
Lease Facility Costs [Member] | 2017 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | 0 | 0 |
Restructuring charges |  | 96 |
Cash Payment |  | (96) |
Non-Cash Activity |  | 0 |
Foreign Exchange Adjustments |  | 0 |
Ending Balance |  | 0 | 0
Other Exit Costs [Member] | 2019 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | 0 |  |
Restructuring charges | 1,597 |  |
Cash Payment | (653) |  |
Non-Cash Activity | (944) |  |
Foreign Exchange Adjustments | 0 |  |
Ending Balance | 0 | 0 |
Other Exit Costs [Member] | 2018 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | 918 | 0 |
Restructuring charges | 461 | 1,773 |
Cash Payment | (1,379) | (855) |
Non-Cash Activity | 0 | 0 |
Foreign Exchange Adjustments | 0 | 0 |
Ending Balance | 0 | 918 | 0
Other Exit Costs [Member] | 2017 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | 135 | 198 |
Restructuring charges | 0 | 270 |
Cash Payment | (124) | (309) |
Non-Cash Activity | 0 | 0 |
Foreign Exchange Adjustments | (11) | (24) |
Ending Balance | 0 | 135 | 198
Other Exit Costs [Member] | 2016 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning Balance | $ 0 | 16 |
Restructuring charges |  | 246 |
Cash Payment |  | (146) |
Non-Cash Activity |  | (116) |
Foreign Exchange Adjustments |  | 0 |
Ending Balance |  | $ 0 | $ 16

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