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Restructuring and Severance - Additional Information (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2017 USD ($)
Restructuring Cost and Reserve [Line Items] |
Unpaid severance and related charges | $ 8.1
Unpaid severance and related charges, period of payment | 12 months
Severance costs |
Restructuring Cost and Reserve [Line Items] |
Unpaid severance and related charges | $ 0.7
RidgeWorth acquisition restructuring plan | Severance costs |
Restructuring Cost and Reserve [Line Items] |
Severance costs | 8.6
Middle office outsourcing project restructuring plan | Severance costs |
Restructuring Cost and Reserve [Line Items] |
Severance costs | $ 0.3

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