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Subsequent Event (Details) - USD ($)
$ / shares in Units, $ in Millions
Aug. 01, 2017
Jul. 27, 2017
Mar. 31, 2017
Subsequent Event [Line Items]      
Quarterly cash dividend declared (usd per share)     $ 0.05
Subsequent event      
Subsequent Event [Line Items]      
Quarterly cash dividend declared (usd per share)   $ 0.05  
Subsequent event | Dynaloy, LLC      
Subsequent Event [Line Items]      
Voting rights acquired (as percent) 100.00%    
Purchase price $ 13