|
Goodwill and Intangible Assets (Changes in Carrying Amount of Goodwill by Segment) (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended |
|---|---|
|
Mar. 31, 2015
|
|
| Goodwill [Roll Forward] | |
| Beginning Balance | $ 98,227 |
| Foreign currency translation adjustment | (8,597) |
| Arlon acquisition | 85,379 |
| Ending Balance | 175,009 |
| Printed Circuit Materials [Member] | |
| Goodwill [Roll Forward] | |
| Beginning Balance | 0 |
| Foreign currency translation adjustment | 0 |
| Arlon acquisition | 51,862 |
| Ending Balance | 51,862 |
| High Performance Foams [Member] | |
| Goodwill [Roll Forward] | |
| Beginning Balance | 23,565 |
| Foreign currency translation adjustment | (275) |
| Arlon acquisition | 33,517 |
| Ending Balance | 56,807 |
| Power Electronics Solutions [Member] | |
| Goodwill [Roll Forward] | |
| Beginning Balance | 72,438 |
| Foreign currency translation adjustment | (8,322) |
| Arlon acquisition | 0 |
| Ending Balance | 64,116 |
| Other [Member] | |
| Goodwill [Roll Forward] | |
| Beginning Balance | 2,224 |
| Foreign currency translation adjustment | 0 |
| Arlon acquisition | 0 |
| Ending Balance | $ 2,224 |