Goodwill and other Identifiable Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2012
|
Sep. 30, 2011
|
---|---|---|
Finite-Lived Intangible Assets [Line Items] | ||
Gross carrying amount | $ 79,629 | $ 78,766 |
Accumulated amortization | (69,000) | (64,406) |
Net | 10,629 | 14,360 |
Purchased and Core Technology [Member]
|
||
Finite-Lived Intangible Assets [Line Items] | ||
Gross carrying amount | 46,597 | 46,412 |
Accumulated amortization | (43,639) | (41,716) |
Net | 2,958 | 4,696 |
Licensing Agreements [Member]
|
||
Finite-Lived Intangible Assets [Line Items] | ||
Gross carrying amount | 2,840 | 2,840 |
Accumulated amortization | (2,682) | (2,610) |
Net | 158 | 230 |
Patents and Trademarks [Member]
|
||
Finite-Lived Intangible Assets [Line Items] | ||
Gross carrying amount | 10,943 | 10,341 |
Accumulated amortization | (8,469) | (7,505) |
Net | 2,474 | 2,836 |
Customer Maintenance Contracts [Member]
|
||
Finite-Lived Intangible Assets [Line Items] | ||
Gross carrying amount | 700 | 700 |
Accumulated amortization | (700) | (674) |
Net | 0 | 26 |
Customer Relationships [Member]
|
||
Finite-Lived Intangible Assets [Line Items] | ||
Gross carrying amount | 17,504 | 17,437 |
Accumulated amortization | (12,465) | (10,865) |
Net | 5,039 | 6,572 |
Noncompete Agreements [Member]
|
||
Finite-Lived Intangible Assets [Line Items] | ||
Gross carrying amount | 1,045 | 1,036 |
Accumulated amortization | (1,045) | (1,036) |
Net | $ 0 | $ 0 |