Commitments and contingencies (Table) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 15,606
Operating Leases, Future Minimum Payments, Due in Two Years	13,189
Operating Leases, Future Minimum Payments, Due in Three Years	11,066
Operating Leases, Future Minimum Payments, Due in Four Years	9,953
Operating Leases, Future Minimum Payments, Due in Five Years	10,068
Operating Leases, Future Minimum Payments, Due Thereafter	10,705
Operating Leases, Future Minimum Payments Due, Total	$ 70,587