Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 27, 2013		Sep. 28, 2012		Sep. 27, 2013		Sep. 28, 2012
Consolidated net income (loss)	$ 1,778		$ (2,515)		$ 3,043		$ 3,765
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax	3,765	[1]	2,070	[1]	(2,015)	[1]	1,924	[1]
Pension liability adjustments, net of tax	(371)	[2]	120	[2]	801	[2]	612	[2]
Total other comprehensive income (loss)	3,394		2,190		(1,214)		2,536
Total consolidated comprehensive income (loss)	5,172		(325)		1,829		6,301
Less: Comprehensive (income) loss attributable to noncontrolling interest	12		(19)		(42)		(45)
Comprehensive income (loss) to GSI Group Inc.	$ 5,184		$ (344)		$ 1,787		$ 6,256

[1] The tax effect on the component of comprehensive income was zero and $1.3 million for the three and nine months ended September 27, 2013, respectively. The impact for the three and nine months ended September 28, 2012 was not material.

[2] The tax effect on the component of comprehensive income was not material for all periods presented. See Note 4 for the total amount of pension liability adjustments reclassified out of accumulated other comprehensive loss.