Joint Ventures (Details) (USD $)	3 Months Ended								12 Months Ended
	Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Jan. 01, 2012	Oct. 02, 2011	Jul. 03, 2011	Apr. 03, 2011	Jan. 02, 2011	Sep. 30, 2012	Oct. 02, 2011	Oct. 03, 2010
Aggregate revenue of consolidated joint ventures	$ 719,405,000	$ 684,698,000	$ 624,345,000	$ 682,627,000	$ 675,662,000	$ 673,792,000	$ 612,566,000	$ 611,124,000	$ 2,711,075,000	$ 2,573,144,000	$ 2,201,232,000
Unconsolidated Joint Ventures
Equity in earnings from unconsolidated joint ventures									2,916,000	4,877,000	1,184,000
Carrying value of assets of unconsolidated joint ventures	19,000,000				24,000,000				19,000,000	24,000,000
Carrying value of liabilities of unconsolidated joint ventures	15,700,000				21,000,000				15,700,000	21,000,000
Consolidated Joint Ventures
Aggregate revenue of consolidated joint ventures									19,300,000	74,300,000
Cash and cash equivalent of consolidated joint ventures	$ 1,600,000				$ 1,000,000				$ 1,600,000	$ 1,000,000