Impairment of Long-Lived Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets	$ 0	$ 4,511
Properties and intangible assets [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets		2,883
Corporate Aircraft [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets		$ 1,628