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Equity Method Investments - Equity Method Investments (Details) - USD ($)
$ in Thousands
 2 Months Ended 3 Months Ended 6 Months Ended
Mar. 03, 2016
Jun. 30, 2017
Mar. 31, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]            
ADES equity earnings   $ 10,155   $ 13,754 $ 23,969 $ 19,331
Equity Method Investment, Financial Statement, Reported Amounts [Abstract]            
Distributions from equity method investees, return on investment         2,875 5,900
Included in investing cash flows         22,313 14,875
Tinuum Group, LLC            
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]            
Gross profit (loss)   25,027   21,154 47,083 47,680
Operating, selling, general and administrative expenses   4,327   4,956 9,801 10,468
Income (loss) from operations   20,700   16,198 37,282 37,212
Other income (expenses)   (359)   (3,021) (947) (4,036)
Class B preferred return   (505)   (1,043) (1,142) (2,186)
Loss attributable to noncontrolling interest   7,926   3,951 17,287 5,907
Net income (loss) available to Class A members   27,762   16,085 52,480 36,897
ADES equity earnings   9,138   12,832 22,313 18,275
Equity Method Investment, Financial Statement, Reported Amounts [Abstract]            
Distributions from equity method investees, return on investment         0 3,400
Distributions from equity method investees in excess of investment basis         22,313 14,875
Included in investing cash flows   9,138 $ 12,612 6,074    
Tinuum Services, LLC            
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]            
Gross profit (loss)   (17,249)   (14,473) (30,128) (27,098)
Operating, selling, general and administrative expenses   37,325   31,128 71,953 67,390
Income (loss) from operations   (54,574)   (45,601) (102,081) (94,488)
Other income (expenses)   84   (20) 69 (40)
Loss attributable to noncontrolling interest   56,523   47,465 105,322 97,754
Net income (loss) available to Class A members   2,033   1,844 3,310 3,226
ADES equity earnings   1,017   922 1,656 1,613
Equity Method Investment, Financial Statement, Reported Amounts [Abstract]            
Distributions from equity method investees, return on investment         2,875 2,500
RMC6, LLC (RCM6)            
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]            
Gross profit (loss) $ (555)          
Operating, selling, general and administrative expenses 360          
Income (loss) from operations (915)          
Other income (expenses) (52)          
Net income (loss) available to Class A members (967)          
ADES equity earnings $ (557) $ 0   $ 0 $ 0 $ (557)