Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 180,261	$ 404,169	$ 347,588
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	15,997	(85,590)	101,056
Foreign currency translation adjustments			100,999
Unrealized (loss) gain on derivatives	(17)	15
Unrealized gain (loss) on derivatives			(58)
Effect of adopted accounting standards	0	10	0
Unrealized loss on available-for-sale investments, net of tax	0	0	(240)
Loss on available-for-sale investments, net of tax reclassified to net income	0	0	538
Total other comprehensive income (loss)	15,980	(85,565)	101,239
Comprehensive income	196,241	318,604	448,827
Comprehensive gain attributable to non-controlling interest	30	129	31
Comprehensive income attributable to IPG Photonics Corporation	$ 196,211	$ 318,475	$ 448,796