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Segment Information - Additional Information (Detail)
3 Months Ended 9 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Mar. 28, 2015
Segment
Mar. 29, 2014
Segment Reporting, Measurement Disclosures [Abstract]        
Number of operating segments (in numbers)     2us-gaap_NumberOfOperatingSegments  
Maximum percentage of revenue from one single customer (in percent) 2.00%gk_MaximumPercentageOfRevenueFromOneSingleCustomer 2.00%gk_MaximumPercentageOfRevenueFromOneSingleCustomer 2.00%gk_MaximumPercentageOfRevenueFromOneSingleCustomer 2.00%gk_MaximumPercentageOfRevenueFromOneSingleCustomer