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Divestitures - Operating Results (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]  
Net income from discontinued operations, net of taxes $ 5,777
Eeva Business | Discontinued Operations, Disposed of by Sale  
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax [Abstract]  
Gain on sale of discontinued operations 7,554
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]  
Income from discontinued operations, before taxes 7,554
Provision for income taxes (1,777)
Net income from discontinued operations, net of taxes $ 5,777