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Other Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, cost | $ 51,527 | $ 50,963
Finite-lived intangible assets, accumulated amortization | 14,926 | 12,241
Total other intangible assets | 63,157 | 62,593
Other intangible assets, net | 48,231 | 50,352
Acquired Intangible Assets [Member] |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, cost | 49,736 | 49,159
Finite-lived intangible assets, accumulated amortization | 14,830 | 12,124
Patents and technology |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, cost | 17,310 | 16,815
Finite-lived intangible assets, accumulated amortization | 5,586 | 4,537
Customer lists |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, cost | 30,877 | 30,877
Finite-lived intangible assets, accumulated amortization | 8,127 | 6,518
Trademarks and brand names |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, cost | 1,549 | 1,467
Finite-lived intangible assets, accumulated amortization | 1,117 | 1,069
Deferred financing costs |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, cost | 1,791 | 1,804
Finite-lived intangible assets, accumulated amortization | 96 | 117
Trademarks and brand names |  |
Schedule of Finite and Indefinite Lived Intangible Assets [Line Items] |  |
Indefinite-lived intangible assets | $ 11,630 | $ 11,630

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