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Goodwill and Other Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Amortized intangible assets |  |
Original Cost | $ 168,923 | $ 169,456
Accumulated Amortization | 62,823 | 49,216
Net Book Value | 106,100 | 120,240
Customer list |  |
Amortized intangible assets |  |
Original Cost | 41,477 | 42,561
Accumulated Amortization | 14,958 | 12,130
Net Book Value | 26,519 | 30,431
Non-compete agreement |  |
Amortized intangible assets |  |
Original Cost | 4,594 | 4,594
Accumulated Amortization | 3,064 | 2,517
Net Book Value | 1,530 | 2,077
Supply agreement |  |
Amortized intangible assets |  |
Original Cost | 9,806 | 9,806
Accumulated Amortization | 4,827 | 3,955
Net Book Value | 4,979 | 5,851
Technology |  |
Amortized intangible assets |  |
Original Cost | 15,500 | 15,500
Accumulated Amortization | 4,243 | 2,483
Net Book Value | 11,257 | 13,017
Trademarks and patents |  |
Amortized intangible assets |  |
Original Cost | 18,717 | 18,717
Accumulated Amortization | 4,335 | 2,273
Net Book Value | 14,382 | 16,444
Lease intangible |  |
Amortized intangible assets |  |
Original Cost | 5,514 | 5,479
Accumulated Amortization | 4,969 | 4,586
Net Book Value | 545 | 893
Software |  |
Amortized intangible assets |  |
Original Cost | 71,362 | 70,846
Accumulated Amortization | 24,592 | 19,508
Net Book Value | 46,770 | 51,338
Other |  |
Amortized intangible assets |  |
Original Cost | 1,953 | 1,953
Accumulated Amortization | 1,835 | 1,764
Net Book Value | $ 118 | $ 189

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