EARNINGS PER SHARE - Reconciliation of Weighted-average Shares Outstanding Used in Calculation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
EARNINGS PER SHARE
Income from continuing operations	$ 74,873	$ 21,047	$ 156,546	$ 94,980
Less: income from continuing operations attributable to noncontrolling interest	9	6	16	70
Income from continuing operations attributable to Advanced Energy Industries, Inc.	$ 74,864	$ 21,041	$ 156,530	$ 94,910
Basic weighted-average common shares outstanding	37,379	38,183	37,482	38,296
Assumed exercise of dilutive stock options and restricted stock units	251	180	243	221
Diluted weighted-average common shares outstanding	37,630	38,363	37,725	38,517
Continuing operations:
Basic earnings per share	$ 2.00	$ 0.55	$ 4.18	$ 2.48
Diluted earnings per share	$ 1.99	$ 0.55	$ 4.15	$ 2.46