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Goodwill and Other Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Finite-Lived Intangible Assets |  |
Gross Carrying Value | $ 81,686 | $ 82,980
Accumulated Amortization | (37,131) | (33,144)
Net Carrying Amount | 44,555 | 49,836
Non-compete agreements |  |
Finite-Lived Intangible Assets |  |
Gross Carrying Value | 1,227 | 1,372
Accumulated Amortization | (1,140) | (1,046)
Net Carrying Amount | 87 | 326
Patents |  |
Finite-Lived Intangible Assets |  |
Gross Carrying Value | 369 | 358
Accumulated Amortization | (181) | (165)
Net Carrying Amount | 188 | 193
Customer relationships |  |
Finite-Lived Intangible Assets |  |
Gross Carrying Value | 36,807 | 37,129
Accumulated Amortization | (13,021) | (11,388)
Net Carrying Amount | 23,786 | 25,741
Trademarks and trade names |  |
Finite-Lived Intangible Assets |  |
Gross Carrying Value | 7,732 | 8,481
Accumulated Amortization | (3,382) | (3,416)
Net Carrying Amount | 4,350 | 5,065
Technology |  |
Finite-Lived Intangible Assets |  |
Gross Carrying Value | 35,551 | 35,640
Accumulated Amortization | (19,407) | (17,129)
Net Carrying Amount | $ 16,144 | $ 18,511
Weighted Average |  |
Finite-Lived Intangible Assets |  |
Weighted Average Amortization Period In Years | 15 years |
Weighted Average | Non-compete agreements |  |
Finite-Lived Intangible Assets |  |
Weighted Average Amortization Period In Years | 4 years | 4 years
Weighted Average | Patents |  |
Finite-Lived Intangible Assets |  |
Weighted Average Amortization Period In Years | 10 years | 10 years
Weighted Average | Customer relationships |  |
Finite-Lived Intangible Assets |  |
Weighted Average Amortization Period In Years | 18 years | 18 years
Weighted Average | Trademarks and trade names |  |
Finite-Lived Intangible Assets |  |
Weighted Average Amortization Period In Years | 16 years | 15 years
Weighted Average | Technology |  |
Finite-Lived Intangible Assets |  |
Weighted Average Amortization Period In Years | 14 years | 14 years

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