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Commitments And Contingencies (Changes To Warranty Liability) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Commitments and Contingencies Disclosure [Abstract]        
Warranty liabilities, beginning of period $ 64,364 $ 70,521 $ 68,025 $ 80,195
Reserves provided 12,593 11,858 32,014 30,966
Payments (10,976) (12,705) (34,336) (40,914)
Other adjustments (1,453) (827) (1,175) (1,400)
Warranty liabilities, end of period $ 64,528 $ 68,847 $ 64,528 $ 68,847