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Commitments and Contingencies (Changes To Warranty Liability) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Commitments and Contingencies Disclosure [Abstract]        
Warranty liabilities, beginning of period $ 63,152 $ 64,420 $ 64,098 $ 68,025
Reserves provided 10,687 11,570 20,757 19,421
Payments (10,744) (11,839) (21,780) (23,360)
Other adjustments (1,181) 213 (1,161) 278
Warranty liabilities, end of period $ 61,914 $ 64,364 $ 61,914 $ 64,364