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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, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Commitments and Contingencies Disclosure [Abstract]        
Warranty liabilities, beginning of period $ 61,914 $ 64,364 $ 64,098 $ 68,025
Reserves provided 15,322 12,593 36,079 32,014
Payments (10,551) (10,976) (32,330) (34,336)
Other adjustments (1,602) (1,453) (2,764) (1,175)
Warranty liabilities, end of period $ 65,083 $ 64,528 $ 65,083 $ 64,528