Commitments and Contingencies (Changes To Warranty Liability) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Movement in Standard Product Warranty Accrual [Roll Forward]
Warranty liabilities, beginning of period	$ 57,401	$ 61,632	$ 65,389	$ 63,992
Reserves provided	11,170	11,881	20,011	20,661
Payments	(14,648)	(10,837)	(31,477)	(21,912)
Other adjustments	579	(690)	579	(755)
Warranty liabilities, end of period	$ 54,502	$ 61,986	$ 54,502	$ 61,986