CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Apr. 03, 2015	Dec. 31, 2014
Current Assets
Cash and cash equivalents	$ 47,542	$ 51,146
Accounts receivable, net of allowance of $221 and $282, respectively	53,360	51,494
Inventories	60,682	62,943
Income taxes receivable	5,178	5,906
Deferred tax assets	5,589	5,971
Prepaid expenses and other current assets	7,099	5,236
Assets held for sale	13,582	631
Total current assets	193,032	183,327
Property, plant and equipment, net	37,590	40,088
Deferred tax assets	2,879	2,912
Other assets	12,984	14,604
Intangible assets, net	70,284	67,242
Goodwill	98,299	90,746
Total assets	415,068	398,919
Current Liabilities
Current portion of long-term debt	7,500	7,500
Accounts payable	27,126	25,592
Income taxes payable	1,055	1,189
Deferred tax liabilities	198	208
Accrued expenses and other current liabilities	21,524	19,401
Liabilities held for sale	2,954	324
Total current liabilities	60,357	54,214
Long-term debt	115,625	107,500
Deferred tax liabilities	2,273	35
Income taxes payable	6,838	7,097
Other liabilities	18,695	18,819
Total liabilities	203,788	187,665
Commitments and Contingencies (Note 13)
Stockholders’ Equity:
Common shares, no par value; Authorized shares: unlimited; Issued and outstanding: 34,406 and 34,219, respectively	423,856	423,856
Additional paid-in capital	28,947	28,590
Accumulated deficit	(221,719)	(225,165)
Accumulated other comprehensive loss	(20,233)	(16,456)
Total GSI Group Inc. stockholders’ equity	210,851	210,825
Noncontrolling interest	429	429
Total stockholders’ equity	211,280	211,254
Total liabilities and stockholders’ equity	$ 415,068	$ 398,919