CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid In Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Total 3D Systems Corporation Stockholders' Equity	Equity Attributable to Noncontrolling Interests
Beginning Balance at Dec. 31, 2018	$ 575,987	$ 117	$ 1,355,503	$ (15,572)	$ (722,701)	$ (38,978)	$ 578,369	$ (2,382)
Issuance (repurchase) of stock	(3,026)	3		(3,029)			(3,026)
Acquisition of non-controlling interest	(13,342)		(7,526)			256	(7,270)	(6,072)
Stock-based compensation expense	19,221		19,221				19,221
Net income (loss)	(64,972)				(65,167)		(65,167)	195
Pension adjustment	207					207	207
Derivative financial instrument gain (loss)	(798)					(798)	(798)
Foreign currency translation adjustment	(6,854)					(6,787)	(6,787)	(67)
Ending Balance at Sep. 30, 2019	506,423	120	1,367,198	(18,601)	(787,868)	(46,100)	514,749	(8,326)
Beginning Balance at Jun. 30, 2019	528,446	120	1,361,569	(16,519)	(771,025)	(37,313)	536,832	(8,386)
Issuance (repurchase) of stock	(2,082)	0		(2,082)			(2,082)
Stock-based compensation expense	5,629		5,629				5,629
Net income (loss)	(16,762)				(16,843)		(16,843)	81
Pension adjustment	91					91	91
Derivative financial instrument gain (loss)	(798)					(798)	(798)
Foreign currency translation adjustment	(8,101)					(8,080)	(8,080)	(21)
Ending Balance at Sep. 30, 2019	$ 506,423	120	1,367,198	(18,601)	(787,868)	(46,100)	514,749	(8,326)
Common stock, par value (in dollars per share)	$ 0.001
Beginning Balance at Dec. 31, 2019	$ 513,896	120	1,371,564	(18,769)	(793,709)	(37,047)	522,159	(8,263)
Issuance (repurchase) of stock	19,969	8	23,782	(3,821)			19,969
Acquisition of non-controlling interest	0		(7,702)			(561)	(8,263)	8,263
Stock-based compensation expense	16,621		16,621				16,621
Net income (loss)	(129,764)				(129,764)		(129,764)
Pension adjustment	130					130	130
Derivative financial instrument gain (loss)	(1,648)					(1,648)	(1,648)
Loss on hedge accounting de-designation	1,235					1,235	1,235
Foreign currency translation adjustment	8,079					8,079	8,079
Ending Balance at Sep. 30, 2020	428,518	128	1,404,265	(22,590)	(923,473)	(29,812)	428,518	0
Beginning Balance at Jun. 30, 2020	463,428	124	1,377,468	(22,590)	(850,584)	(40,990)	463,428
Issuance (repurchase) of stock	23,789	4	23,785				23,789
Stock-based compensation expense	3,012		3,012				3,012
Net income (loss)	(72,889)				(72,889)		(72,889)
Pension adjustment	(47)					(47)	(47)
Derivative financial instrument gain (loss)	11					11	11
Foreign currency translation adjustment	11,214					11,214	11,214
Ending Balance at Sep. 30, 2020	$ 428,518	$ 128	$ 1,404,265	$ (22,590)	$ (923,473)	$ (29,812)	$ 428,518	$ 0
Common stock, par value (in dollars per share)	$ 0.001