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Equity Method Investments - Rollforward of CCS Investment (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Feb. 10, 2014
Equity Method Investments [Roll Forward]                    
Beginning balance     $ 19,584       $ 19,584      
Cash distributions from CCS $ 41     $ (5,603)     (5,133) $ (22,019)    
Adjustment for current year cash distributions in excess of investment balance             4,730 22,547    
Total investment balance, equity earnings (loss) and cash distributions 18,546           18,546      
Clean Coal Solutions (CCS)                    
Equity Method Investments [Roll Forward]                    
Beginning balance 0 $ 0 0 0 $ 0 $ 0 0 0    
ADES proportionate share of income from CCS 8,127 7,825 9,827 7,805 5,130 4,644        
Increase of equity loss in excess of investment balance (prior to cash distributions) (8,127) (7,825) (9,827) (7,805) (5,130) (4,644)        
Cash distributions from CCS 0 (4,630) (100) (6,226) (9,733) (6,588) (4,730) (22,547)    
Adjustment for current year cash distributions in excess of investment balance 0 4,630 100 6,226 9,733 6,588        
Total investment balance, equity earnings (loss) and cash distributions $ 0 0 0 0 0 0 $ 0 0    
Ownership interest, percent 42.50%           42.50%   42.50%  
Ownership interest multiplied by net income available to members, percent 42.50%           42.50%      
Clean Coal Solutions (CCS) | ADES equity earnings (loss)                    
Equity Method Investments [Roll Forward]                    
Beginning balance $ 4,630 100 0 9,733 6,588 0 $ 0 0    
ADES proportionate share of income from CCS 8,127 7,825 9,827 7,805 5,130 4,644        
Increase of equity loss in excess of investment balance (prior to cash distributions) (8,127) (7,825) (9,827) (7,805) (5,130) (4,644)        
Cash distributions from CCS 0 0 0 0 0 0        
Adjustment for current year cash distributions in excess of investment balance 0 4,630 100 6,226 9,733 6,588        
Total investment balance, equity earnings (loss) and cash distributions 0 4,630 100 6,226 9,733 6,588 0 6,226    
Clean Coal Solutions (CCS) | Cash distributions                    
Equity Method Investments [Roll Forward]                    
Beginning balance 4,630 100 0 9,733 6,588 0 0 0    
ADES proportionate share of income from CCS 0 0 0 0 0 0        
Increase of equity loss in excess of investment balance (prior to cash distributions) 0 0 0 0 0 0        
Cash distributions from CCS 0 4,630 100 6,226 9,733 6,588        
Adjustment for current year cash distributions in excess of investment balance 0 0 0 0 0 0        
Total investment balance, equity earnings (loss) and cash distributions 0 4,630 100 6,226 9,733 6,588 0 6,226    
Clean Coal Solutions (CCS) | Cash distributions and equity loss in (excess) of investment balance                    
Equity Method Investments [Roll Forward]                    
Beginning balance (16,955) (20,150) (29,877) (19,453) (14,850) (12,906) (29,877) (12,906)    
ADES proportionate share of income from CCS 0 0 0 0 0 0        
Increase of equity loss in excess of investment balance (prior to cash distributions) 8,127 7,825 9,827 7,805 5,130 4,644        
Cash distributions from CCS 0 0 0 0 0 0        
Adjustment for current year cash distributions in excess of investment balance 0 (4,630) (100) (6,226) (9,733) (6,588)        
Total investment balance, equity earnings (loss) and cash distributions (8,828) $ (16,955) (20,150) (17,874) $ (19,453) $ (14,850) (8,828) (17,874)    
RMC6, LLC (RCM6)                    
Equity Method Investments [Roll Forward]                    
Beginning balance     $ 15,400       15,400      
Cash distributions from CCS 1,399     $ 1,515     3,127 $ 3,057    
Total investment balance, equity earnings (loss) and cash distributions $ 13,400           $ 13,400      
Ownership interest, percent 24.95%           24.95%   24.95% 24.95%