CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 27, 2014		Jun. 28, 2013		Jun. 27, 2014		Jun. 28, 2013
Consolidated net income (loss)	$ 728		$ (853)		$ 1,718		$ 1,265
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax	1,006	[1]	(86)	[1]	943	[1]	(5,780)	[1]
Pension liability adjustments, net of tax	(50)	[2]	223	[2]	14	[2]	1,172	[2]
Total other comprehensive income (loss)	956		137		957		(4,608)
Total consolidated comprehensive income (loss)	1,684		(716)		2,675		(3,343)
Less: Comprehensive (income) attributable to noncontrolling interest	(3)		(18)		(10)		(54)
Comprehensive income (loss) to GSI Group Inc.	$ 1,681		$ (734)		$ 2,665		$ (3,397)

[1] The tax effect on this component of comprehensive income was $0.2 million for the three and six months ended June 27, 2014, respectively. The impact was zero and $1.3 million for the three and six months ended June 28, 2013, respectively.

[2] The tax effect on this 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.