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Acquisitions, Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Acquired Intangible Assets |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization | $ 66,965 |  | $ 66,627
Indefinite-Lived Intangible Assets - Purchased research and development | 4,687 |  | 4,687
Intangible Assets, Gross (Excluding Goodwill) | 180,965 |  | 167,562
Intangible Assets, Net (Excluding Goodwill) | 114,000 | $ 102,862 | 100,935
Customer Relationships |  |  |
Acquired Intangible Assets |  |  |
Finite-Lived Intangible Assets, Gross | 106,552 |  | 94,560
Finite-Lived Intangible Assets, Accumulated Amortization | 27,989 |  | 30,514
Finite-Lived Intangible Assets, Net | $ 78,563 |  | $ 64,046
Customer Relationships | Minimum |  |  |
Acquired Intangible Assets |  |  |
Estimated useful life in years | 6 years |  | 6 years
Customer Relationships | Maximum |  |  |
Acquired Intangible Assets |  |  |
Estimated useful life in years | 16 years |  | 16 years
Patents |  |  |
Acquired Intangible Assets |  |  |
Finite-Lived Intangible Assets, Gross | $ 55,082 |  | $ 54,293
Finite-Lived Intangible Assets, Accumulated Amortization | 30,738 |  | 28,255
Finite-Lived Intangible Assets, Net | $ 24,344 |  | $ 26,038
Patents | Minimum |  |  |
Acquired Intangible Assets |  |  |
Estimated useful life in years | 3 years |  | 3 years
Patents | Maximum |  |  |
Acquired Intangible Assets |  |  |
Estimated useful life in years | 19 years |  | 19 years
Tradenames |  |  |
Acquired Intangible Assets |  |  |
Finite-Lived Intangible Assets, Gross | $ 9,766 |  | $ 8,935
Finite-Lived Intangible Assets, Accumulated Amortization | 4,932 |  | 4,751
Finite-Lived Intangible Assets, Net | $ 4,834 |  | $ 4,184
Tradenames | Minimum |  |  |
Acquired Intangible Assets |  |  |
Estimated useful life in years | 3 years |  | 3 years
Tradenames | Maximum |  |  |
Acquired Intangible Assets |  |  |
Estimated useful life in years | 15 years |  | 15 years
Non-compete Agreements |  |  |
Acquired Intangible Assets |  |  |
Finite-Lived Intangible Assets, Gross | $ 4,569 |  | $ 4,493
Finite-Lived Intangible Assets, Accumulated Amortization | 3,246 |  | 2,800
Finite-Lived Intangible Assets, Net | $ 1,323 |  | $ 1,693
Non-compete Agreements | Minimum |  |  |
Acquired Intangible Assets |  |  |
Estimated useful life in years | 3 years |  | 3 years
Non-compete Agreements | Maximum |  |  |
Acquired Intangible Assets |  |  |
Estimated useful life in years | 6 years |  | 6 years
Other |  |  |
Acquired Intangible Assets |  |  |
Finite-Lived Intangible Assets, Gross | $ 309 |  | $ 594
Finite-Lived Intangible Assets, Accumulated Amortization | 60 |  | 307
Finite-Lived Intangible Assets, Net | $ 249 |  | $ 287
Other | Minimum |  |  |
Acquired Intangible Assets |  |  |
Estimated useful life in years | 2 years | 2 years |
Other | Maximum |  |  |
Acquired Intangible Assets |  |  |
Estimated useful life in years | 12 years | 12 years |

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