Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 104,103	$ 67,031	$ 179,035	$ 116,360
Other comprehensive income, net of tax:
Translation adjustments	32,522	(3,615)	59,221	24,880
Unrealized (loss) gain on derivatives	(30)	151	(46)	151
Loss on available-for-sale investments, net of tax reclassified to net income	0	0	298	0
Total other comprehensive loss	32,492	(3,464)	59,473	25,031
Comprehensive income	136,595	63,567	238,508	141,391
Comprehensive loss attributable to noncontrolling interest	(37)	(19)	(26)	(13)
Comprehensive income attributable to IPG Photonics Corporation	$ 136,632	$ 63,586	$ 238,534	$ 141,404