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Revenue Accounting for Contracts / Accounting for Joint Ventures (Subcontractor Costs) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Mar. 28, 2014
Mar. 29, 2013
Mar. 28, 2014
Mar. 29, 2013
Revenue Accounting for Contracts / Accounting for Joint Ventures [Abstract]        
Pass-through costs included in revenues $ 700,558 $ 573,617 $ 1,452,581 $ 1,120,033