Summary of Goodwill by Reportable Segment (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2013
|
Dec. 31, 2012
|
---|---|---|
Goodwill [Line Items] | ||
Goodwill | $ 61,745 | $ 99,236 |
Clear Aligner [Member]
|
||
Goodwill [Line Items] | ||
Goodwill | 61,745 | 58,543 |
Scanners and CAD/CAM Services
|
||
Goodwill [Line Items] | ||
Goodwill | $ 0 | $ 40,693 |