Leases	6 Months Ended
Jun. 29, 2014
Leases [Abstract]
Leases of Lessee Disclosure [Text Block]	Leases On August 22, 2013, the Company sold one of its facilities located in Boston, Massachusetts for net proceeds of $47.6 million. Simultaneously with the closing of the sale of the property, the Company entered into a lease agreement to lease back the property for its continued use. The lease has an initial term of 15 years and the Company has the right to extend the term of the lease for two additional periods of ten years each. The lease is accounted for as an operating lease and at the transaction date the Company had deferred $26.5 million of gains which are being amortized in operating expenses over the initial lease term of 15 years. During the six months ended June 29, 2014, the Company amortized $0.9 million of deferred gains related to the lease. At June 29, 2014, $25.0 million of these deferred gains remained to be amortized, which were recorded in long-term liabilities. At December 29, 2013, $25.9 million of deferred gains remained to be amortized, which were recorded in long-term liabilities.

Leases

6 Months Ended

Jun. 29, 2014

Leases of Lessee Disclosure [Text Block]

Leases

On August 22, 2013, the Company sold one of its facilities located in Boston, Massachusetts for net proceeds of $47.6 million. Simultaneously with the closing of the sale of the property, the Company entered into a lease agreement to lease back the property for its continued use. The lease has an initial term of 15 years and the Company has the right to extend the term of the lease for two additional periods of ten years each. The lease is accounted for as an operating lease and at the transaction date the Company had deferred $26.5 million of gains which are being amortized in operating expenses over the initial lease term of 15 years. During the six months ended June 29, 2014, the Company amortized $0.9 million of deferred gains related to the lease. At June 29, 2014, $25.0 million of these deferred gains remained to be amortized, which were recorded in long-term liabilities. At December 29, 2013, $25.9 million of deferred gains remained to be amortized, which were recorded in long-term liabilities.