Quarterly report pursuant to Section 13 or 15(d)

Other Commitments and Contingencies (Details)

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Other Commitments and Contingencies (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2017
Jun. 30, 2017
Dec. 31, 2017
Litigation      
Legal settlement expense   $ 30,000  
Owens      
Litigation      
Legal settlement expense $ 30,000    
Settlement paid     $ 30,000