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Commitments And Contingencies (Changes To Warranty Liability) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Changes to warranty liabilities [Roll Forward]      
Warranty liabilities, beginning of period $ 65,389 $ 63,992 $ 64,098
Warranty reserves provided 52,684 51,348 49,399
Payments (60,968) (47,968) (44,925)
Other adjustments 4,074 (1,983) (4,580)
Warranty liabilities, end of period $ 61,179 $ 65,389 $ 63,992