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Acquisition (Additional Information) (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jan. 22, 2015 | Sep. 30, 2015 | Mar. 31, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Business Acquisition [Line Items] |  |  |  |  |  |
Weighted average amortization period (in years) |  |  |  |  | 5 years 8 months |
Annual amortization expense |  | $ 2,800 |  | $ 1,500 | $ 8,000 | $ 4,700
Annual Future Amortization Expense |  |  |  |  |  |
Anticipated future amortization expense for remainder of 2015 |  | 2,800 |  |  | 2,800 |
Anticipated future amortization expense for 2016 |  | 10,400 |  |  | 10,400 |
Anticipated future amortization expense for 2017 |  | 10,000 |  |  | 10,000 |
Anticipated future amortization expense for 2018 |  | 9,500 |  |  | 9,500 |
Anticipated future amortization expense for 2019 |  | 9,000 |  |  | 9,000 |
Operating income |  | 23,055 |  | $ 28,389 | $ 63,665 | $ 66,066
Customer relationships [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Weighted average amortization period (in years) |  |  |  |  | 6 years 3 months |
Arlon [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Consideration transferred | $ 157,000 |  |  |  |  |
Intangible assets | 50,020 |  |  |  |  |
Annual Future Amortization Expense |  |  |  |  |  |
Anticipated future amortization expense for remainder of 2015 |  | 1,600 |  |  | $ 1,600 |
Anticipated future amortization expense for 2016 |  | 5,800 |  |  | 5,800 |
Anticipated future amortization expense for 2017 |  | 5,800 |  |  | 5,800 |
Anticipated future amortization expense for 2018 |  | 5,800 |  |  | 5,800 |
Anticipated future amortization expense for 2019 |  | 5,800 |  |  | 5,800 |
Transaction costs |  | 1,500 |  |  | 1,500 |
Revenues |  | 27,800 |  |  | 73,400 |
Operating income |  | $ 3,600 |  |  | $ 7,700 |
Arlon [Member] | Minimum [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Annual amortization expense | 1,600 |  |  |  |  |
Arlon [Member] | Maximum [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Annual amortization expense | 5,800 |  |  |  |  |
Arlon [Member] | Developed technology [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets | $ 15,800 |  |  |  |  |
Weighted average amortization period (in years) | 5 years 8 months |  |  |  |  |
Arlon [Member] | Customer relationships [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets | $ 32,700 |  |  |  |  |
Weighted average amortization period (in years) | 6 years |  |  |  |  |
Arlon [Member] | Trademarks [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets | $ 1,600 |  |  |  |  |
Weighted average amortization period (in years) | 3 years 2 months |  |  |  |  |
Arlon [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Proceeds from line of credit | $ 125,000 |  | $ 125,000 |  |  |

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