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Goodwill Impairment (Details)
$ in Thousands
Mar. 31, 2017
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
$ / bbl
Dec. 31, 2015
USD ($)
Mar. 31, 2015
USD ($)
Goodwill          
Goodwill | $ $ 1,451,716 $ 423,700 $ 1,315,362   $ 1,558,233
Water solutions          
Goodwill          
Goodwill | $ $ 424,270   $ 290,915 $ 660,800 $ 523,790
Operating segment | Water solutions          
Goodwill          
Assumed quarterly increase in barrel price     1    
Assumed barrel price, 2021     65    
Barrel price     32    
Assumed barrel price, after 2021     65    
Fair value in excess of carrying amount       9.00%  
Fair value below carrying amount     11.00%