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Sale of BondPoint - Narrative (Details) - BondPoint - Disposal Group, Disposed of by Sale, Not Discontinued Operations - USD ($)
$ in Thousands
12 Months Ended
Jan. 02, 2018
Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Proceeds from sale of BondPoint $ 400,200  
Transaction costs 8,568  
Professional fees 7,100  
Compensation expense 1,400  
Gain on sale of BondPoint, net of transaction costs $ 337,550 $ 337,600