Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Sales, net:
Total sales, net	$ 175,127	$ 173,082	$ 450,680	$ 564,731
Cost of sales:
Total cost of sales	101,636	87,543	247,323	274,312
Gross profit	73,491	85,539	203,357	290,419
Operating expenses:
Research and development	24,546	18,451	67,675	55,283
Selling, general and administrative	36,401	25,386	93,027	78,792
Amortization of intangible assets	3,002	1,437	6,849	3,958
Restructuring expense	152	403	3,620	403
Total operating expenses	64,101	45,677	171,171	138,436
Operating income	9,390	39,862	32,186	151,983
Other income (expense), net	1,361	401	17,649	(58)
Income from continuing operations, before income taxes	10,751	40,263	49,835	151,925
Provision for income taxes	3,495	5,106	3,819	23,998
Income from continuing operations	7,256	35,157	46,016	127,927
Income (loss) from discontinued operations, net of income taxes	375	(371)	8,690	(226)
Net income	7,631	34,786	54,706	127,701
Income from continuing operations attributable to noncontrolling interest	10	7	29	82
Net income attributable to Advanced Energy Industries, Inc.	$ 7,621	$ 34,779	$ 54,677	$ 127,619
Basic weighted-average common shares outstanding	38,313	38,970	38,258	39,309
Diluted weighted-average common shares outstanding	38,489	39,195	38,457	39,594
Continuing operations: Basic earnings per share	$ 0.19	$ 0.90	$ 1.20	$ 3.25
Continuing operations: Diluted earnings per share	0.19	0.90	1.20	3.23
Discontinued operations: Basic earnings per share	0.01	(0.01)	0.23	(0.01)
Discontinued operations: Diluted earnings per share	0.01	(0.01)	0.23	(0.01)
Basic earnings per share	0.20	0.89	1.43	3.25
Diluted earnings per share	$ 0.20	$ 0.89	$ 1.42	$ 3.23
Product [Member]
Sales, net:
Total sales, net	$ 148,138	$ 144,843	$ 366,443	$ 485,287
Cost of sales:
Total cost of sales	87,536	73,019	204,450	233,778
Service [Member]
Sales, net:
Total sales, net	26,989	28,239	84,237	79,444
Cost of sales:
Total cost of sales	$ 14,100	$ 14,524	$ 42,873	$ 40,534