Consolidated Statements Of Equity - USD ($) $ in Thousands	Total	COMMON STOCK	ADDITIONAL PAID-IN CAPITAL	RETAINED EARNINGS	ACCUMULATED OTHER COMPREHENSIVE LOSS	TOTAL IPG PHOTONICS CORPORATION STOCKHOLDERS' EQUITY	NONCONTROLLING INTERESTS
Balance, beginning of year (in shares) at Dec. 31, 2012		51,359,247
Balance, beginning of year at Dec. 31, 2012		$ 5	$ 511,039	$ 234,977	$ (3,094)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		540,232
Common stock issued under employee stock purchase plan (in shares)		31,499
Stock-based compensation			11,720
Exercise of stock options and related tax benefit from exercise			14,523
Common stock issued under employee stock purchase plan			1,626
Net income attributable to IPG Photonics Corporation	$ 155,780			155,780
Translation adjustments	1,125				1,125
Unrealized gain on derivatives, net of tax	268				268
LESS: NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0						$ 0
Other comprehensive loss attributable to NCI	0
Balance, end of year (in shares) at Dec. 31, 2013		51,930,978
Balance, end of year at Dec. 31, 2013	927,969	$ 5	538,908	390,757	(1,701)	$ 927,969
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		402,647
Common stock issued under employee stock purchase plan (in shares)		36,063
Stock-based compensation			15,172
Exercise of stock options and related tax benefit from exercise			11,428
Common stock issued under employee stock purchase plan			2,109
Net income attributable to IPG Photonics Corporation	200,445			200,445
Translation adjustments	(110,734)				(110,734)
Unrealized gain on derivatives, net of tax	172				172
LESS: NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0
Other comprehensive loss attributable to NCI	0
Balance, end of year (in shares) at Dec. 31, 2014		52,369,688
Balance, end of year at Dec. 31, 2014	$ 1,046,561	$ 5	567,617	591,202	(112,263)	1,046,561	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)	447,705	477,785
Common stock issued under employee stock purchase plan (in shares)		36,429
Stock-based compensation			18,989
Exercise of stock options and related tax benefit from exercise			18,582
Common stock issued under employee stock purchase plan			2,461
Net income attributable to IPG Photonics Corporation	$ 242,154			242,154
Translation adjustments	(69,314)				(69,314)
Unrealized gain on derivatives, net of tax	95				95
NCI of acquired company							1,579
LESS: NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(127)
Other comprehensive loss attributable to NCI	442						(315)
Balance, end of year (in shares) at Dec. 31, 2015		52,883,902
Balance, end of year at Dec. 31, 2015	$ 1,260,665	$ 5	$ 607,649	$ 833,356	$ (181,482)	$ 1,259,528	$ 1,137