Summary of Significant Accounting Policies	9 Months Ended
Oct. 02, 2015
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Basis of Presentation – The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information (Accounting Standards Codification (“ASC”) 270, Interim Reporting) and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information necessary for a full presentation of financial position, results of operations, and cash flows in conformity with accounting principles generally accepted in the United States of America (“GAAP”). Operating results for interim periods are not necessarily indicative of results that may be expected for the fiscal year as a whole. In the opinion of management, the condensed consolidated financial statements reflect all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation of the results of Greatbatch, Inc. and its subsidiaries (collectively “Greatbatch” or the “Company”) for the periods presented. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, sales, expenses, and related disclosures at the date of the financial statements and during the reporting period. Actual results could differ materially from these estimates. The January 2, 2015 condensed consolidated balance sheet data was derived from audited consolidated financial statements but does not include all disclosures required by GAAP. For further information, refer to the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended January 2, 2015. The Company utilizes a fifty-two, fifty-three week fiscal year ending on the Friday nearest December 31. The third quarter and first nine month periods of 2015 and 2014 each contained 13 weeks and 39 weeks, respectively, and ended on October 2, and October 3, respectively. Nature of Operations – The Company has two reportable segments: Greatbatch Medical and QiG Group (“QiG”). Greatbatch Medical designs and manufactures medical devices and components where Greatbatch either owns the intellectual property or has unique manufacturing and assembly expertise. Greatbatch Medical provides medical devices, components, design engineering services, and value-added assembly to the cardiac/neuromodulation, orthopaedics, portable medical, vascular, and energy, military and environmental markets. QiG is a medical device company formed in 2008 to develop and commercialize a neurostimulation technology platform for treatment of various disorders by stimulating tissues associated with the nervous system. On July 30, 2015, Greatbatch announced a proposed spin-off of a portion of its QiG segment through a tax-free distribution of all of the shares of its QiG Group LLC subsidiary to the stockholders of Greatbatch on a pro rata basis (the “Spin-off”). Immediately prior to completion of the Spin-off, QiG Group LLC will be converted into a corporation organized under the laws of Delaware and change its name to Nuvectra Corporation (“Nuvectra”). The Spin-off is expected to be completed in the first quarter of 2016. See Note 15 “Business Segment, Geographic and Concentration Risk Information” for further description of this transaction and the entities included in the Spin-off. On October 27, 2015, the Company acquired all of the outstanding common stock of Lake Region Medical Holdings, Inc. (“Lake Region Medical”) for a total purchase price including debt assumed of approximately $1.77 billion. Lake Region Medical offers fully integrated outsourced manufacturing and engineering services, contract manufacturing, finished device assembly, original device development and supply chain management services from concept to point-of-care in the cardio & vascular and advanced surgical markets. After completing the acquisition, Greatbatch is one of the largest medical device outsource (“MDO”) manufacturers in the world. As a result of the Lake Region Medical acquisition and proposed Spin-off, the Company is reevaluating its operating and reporting segments. See Note 17 “Subsequent Events” for further description of this transaction and the significant impact it will have on the Company’s financial position and results of operations.

Basis of Presentation – The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information (Accounting Standards Codification (“ASC”) 270, Interim Reporting) and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information necessary for a full presentation of financial position, results of operations, and cash flows in conformity with accounting principles generally accepted in the United States of America (“GAAP”). Operating results for interim periods are not necessarily indicative of results that may be expected for the fiscal year as a whole. In the opinion of management, the condensed consolidated financial statements reflect all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation of the results of Greatbatch, Inc. and its subsidiaries (collectively “Greatbatch” or the “Company”) for the periods presented. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, sales, expenses, and related disclosures at the date of the financial statements and during the reporting period. Actual results could differ materially from these estimates. The January 2, 2015 condensed consolidated balance sheet data was derived from audited consolidated financial statements but does not include all disclosures required by GAAP. For further information, refer to the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended January 2, 2015. The Company utilizes a fifty-two, fifty-three week fiscal year ending on the Friday nearest December 31. The third quarter and first nine month periods of 2015 and 2014 each contained 13 weeks and 39 weeks, respectively, and ended on October 2, and October 3, respectively.

Nature of Operations – The Company has two reportable segments: Greatbatch Medical and QiG Group (“QiG”). Greatbatch Medical designs and manufactures medical devices and components where Greatbatch either owns the intellectual property or has unique manufacturing and assembly expertise. Greatbatch Medical provides medical devices, components, design engineering services, and value-added assembly to the cardiac/neuromodulation, orthopaedics, portable medical, vascular, and energy, military and environmental markets. QiG is a medical device company formed in 2008 to develop and commercialize a neurostimulation technology platform for treatment of various disorders by stimulating tissues associated with the nervous system.

On July 30, 2015, Greatbatch announced a proposed spin-off of a portion of its QiG segment through a tax-free distribution of all of the shares of its QiG Group LLC subsidiary to the stockholders of Greatbatch on a pro rata basis (the “Spin-off”). Immediately prior to completion of the Spin-off, QiG Group LLC will be converted into a corporation organized under the laws of Delaware and change its name to Nuvectra Corporation (“Nuvectra”). The Spin-off is expected to be completed in the first quarter of 2016. See Note 15 “Business Segment, Geographic and Concentration Risk Information” for further description of this transaction and the entities included in the Spin-off.

On October 27, 2015, the Company acquired all of the outstanding common stock of Lake Region Medical Holdings, Inc. (“Lake Region Medical”) for a total purchase price including debt assumed of approximately $1.77 billion. Lake Region Medical offers fully integrated outsourced manufacturing and engineering services, contract manufacturing, finished device assembly, original device development and supply chain management services from concept to point-of-care in the cardio & vascular and advanced surgical markets. After completing the acquisition, Greatbatch is one of the largest medical device outsource (“MDO”) manufacturers in the world. As a result of the Lake Region Medical acquisition and proposed Spin-off, the Company is reevaluating its operating and reporting segments. See Note 17 “Subsequent Events” for further description of this transaction and the significant impact it will have on the Company’s financial position and results of operations.