Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current Assets
Cash and cash equivalents	$ 60,980	$ 65,788
Accounts receivable, net of allowance of $651 and $374, respectively	53,913	42,652
Inventories	66,744	52,801
Deferred tax assets	7,016	7,583
Income taxes receivable	5,769	16,540
Prepaid expenses and other current assets	5,380	5,486
Assets of discontinued operations		17,618
Total current assets	199,802	208,468
Property, plant and equipment, net	32,490	32,338
Deferred tax assets	564	3,884
Other assets	9,502	8,172
Intangible assets, net	65,293	40,020
Goodwill	71,156	44,578
Total assets	378,807	337,460
Current Liabilities
Current portion of long-term debt	7,500	7,500
Accounts payable	26,745	18,824
Income taxes payable	1,018	3,317
Deferred tax liabilities	177	402
Accrued expenses and other current liabilities	24,576	19,278
Liabilities of discontinued operations	54	5,605
Total current liabilities	60,070	54,926
Long-term debt	64,000	42,500
Deferred tax liabilities	1,474	255
Income taxes payable	5,596	1,764
Other liabilities	5,264	9,809
Total liabilities	136,404	109,254
Commitments and Contingencies (Note 16)
Stockholders' Equity:
Common shares, no par value; Authorized shares: unlimited; Issued and outstanding: 33,991 and 33,796, respectively	423,856	423,856
Additional paid-in capital	25,383	21,924
Accumulated deficit	(200,913)	(208,222)
Accumulated other comprehensive loss	(6,342)	(9,749)
Total GSI Group Inc. stockholders' equity	241,984	227,809
Noncontrolling interest	419	397
Total stockholders' equity	242,403	228,206
Total liabilities and stockholders' equity	$ 378,807	$ 337,460