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Equity Method Investments - Rollforward of CCS Investment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Equity Method Investments [Roll Forward]
Beginning balance	$ 39,155
Total investment balance, equity earnings (loss) and cash distributions	30,312
Retained earnings	50,853		$ 57,336
Tinuum Group, LLC
Equity Method Investments [Roll Forward]
Beginning balance	32,280	$ 0
Impact of adoption of accounting standards					$ 37,232
ADES proportionate share of income from Tinuum Group	6,438	21,439
Recovery of prior cash distributions in excess of investment balance (prior to cash distributions)		1,672
Cash distributions from Tinuum Group	13,764	16,788
Total investment balance, equity earnings (loss) and cash distributions	24,954	40,211
Tinuum Group, LLC | Difference between Revenue Guidance in Effect before and after Topic 606 | ASU No. 2014-09
Equity Method Investments [Roll Forward]
Retained earnings				$ 27,400
Tinuum Group, LLC | ADES equity earnings (loss)
Equity Method Investments [Roll Forward]
Beginning balance	0	0
Impact of adoption of accounting standards					0
ADES proportionate share of income from Tinuum Group	6,438	21,439
Recovery of prior cash distributions in excess of investment balance (prior to cash distributions)		1,672
Cash distributions from Tinuum Group	0	0
Total investment balance, equity earnings (loss) and cash distributions	6,438	19,767
Tinuum Group, LLC | Cash distributions
Equity Method Investments [Roll Forward]
Beginning balance	0	0
Impact of adoption of accounting standards					0
ADES proportionate share of income from Tinuum Group	0	0
Recovery of prior cash distributions in excess of investment balance (prior to cash distributions)		0
Cash distributions from Tinuum Group	13,764	16,788
Total investment balance, equity earnings (loss) and cash distributions	13,764	16,788
Tinuum Group, LLC | Memorandum Account: Cash distributions and equity loss in (excess) of investment balance
Equity Method Investments [Roll Forward]
Beginning balance	0	1,672
Impact of adoption of accounting standards					$ 0
ADES proportionate share of income from Tinuum Group	0	0
Recovery of prior cash distributions in excess of investment balance (prior to cash distributions)		1,672
Cash distributions from Tinuum Group	0	0
Total investment balance, equity earnings (loss) and cash distributions	$ 0	$ 0

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