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Leased Property under Capital Leases (Details) (USD $) In Thousands, unless otherwise specified				6 Months Ended
	Jul. 01, 2012	Jan. 01, 2012	Jul. 03, 2011	Jul. 01, 2012 Minimum [Member]	Jul. 01, 2012 Maximum [Member]
Leased property under capital leases
Leased property under capital leases, estimated useful lives				3 years	20 years
Leased property under capital leases	$ 94,180	$ 95,509	$ 95,521
Less: Accumulated amortization	37,128	35,705	32,725
Leased property under capital leases, net	$ 57,052	$ 59,804	$ 62,796

Property, plant, or equipment held under lease agreements classified as an asset.

The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.