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Restructuring Expenses Restructuring (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 USD ($) Employee | Jun. 30, 2016 USD ($)
Restructuring Cost and Reserve [Line Items] |  |
Number of positions eliminated | Employee | 36 |
Payments for restructuring |  | $ 1.2
Restructuring costs expected to be paid | $ 0.5 | $ 0.5
Employee Severance |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring expenses | $ 1.7 |

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