Intangibles - Finite and Indefinite Lived Intangibles (Details) - USD ($)
$ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |
|
|
| Historical Cost |
$ 88,540
|
$ 90,005
|
| Accumulated Amortization |
59,517
|
59,005
|
| Customer lists |
|
|
| Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |
|
|
| Historical Cost |
49,362
|
49,858
|
| Accumulated Amortization |
45,797
|
45,019
|
| License agreements |
|
|
| Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |
|
|
| Historical Cost |
1,126
|
1,098
|
| Accumulated Amortization |
1,126
|
1,098
|
| Developed technology |
|
|
| Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |
|
|
| Historical Cost |
7,287
|
7,405
|
| Accumulated Amortization |
5,969
|
5,921
|
| Patents |
|
|
| Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |
|
|
| Historical Cost |
5,512
|
5,959
|
| Accumulated Amortization |
5,487
|
5,843
|
| Other |
|
|
| Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |
|
|
| Historical Cost |
1,162
|
1,161
|
| Accumulated Amortization |
1,138
|
1,124
|
| Trademarks |
|
|
| Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |
|
|
| Historical Cost |
$ 24,091
|
$ 24,524
|