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Commitments and Contingencies (Changes To Warranty Liability) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Movement in Standard Product Warranty Accrual [Roll Forward]        
Warranty liabilities, beginning of period $ 54,502 $ 61,986 $ 65,389 $ 63,992
Reserves provided 12,575 12,375 32,586 33,036
Payments (14,316) (12,674) (45,793) (34,586)
Other adjustments 1,773 (222) 2,352 (977)
Warranty liabilities, end of period $ 54,534 $ 61,465 $ 54,534 $ 61,465