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Commitments and Contingencies (Changes To Warranty Liability) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Movement in Standard Product Warranty Accrual [Roll Forward]        
Warranty liabilities, beginning of period $ 81,442 $ 72,169 $ 79,154 $ 72,709
Reserves provided 16,152 18,376 43,060 46,022
Payments (19,573) (15,993) (53,634) (47,403)
Other adjustments (a) 10,402 638 19,843 3,862
Warranty liabilities, end of period 88,423 $ 75,190 88,423 $ 75,190
Cost to complete repairs $ 9,000   $ 14,800