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Discontinued Operations (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 15 Months Ended
Mar. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Gain on sale of discontinued operations, net of taxes   $ 0 $ 0 $ 0 $ 27,307  
United Life | Discontinued Operations, Disposed of by Sale            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Disposal group, cash consideration $ 280,000          
Disposal group, adjustment to consideration 21          
Proceeds from disposal of subsidiary 279,979          
Gain on sale of discontinued operations, net of taxes $ 27,307          
Transition services agreement duration 24 months          
Cash received as part of the TSA agreement           $ 717