Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Disclosure Accrued Expenses [Abstract]
Accrued payroll and related expenses	$ 67,859	$ 74,505
Standard Product Warranty Accrual, Current	50,098	40,851
Advanced customer deposits	40,039	41,735
Accrued warranty	50,098	40,851
Product Liability Contingency, Loss Exposure in Excess of Accrual, High Estimate	6,046	7,003
Accured Restructuring Liabilities, Current	3,352	2,295
Accrued customer rebates	39,110	49,923
Accrued Product Liability And Workers Compensation Liability Current	12,138	11,417
Accrued agent commission	12,528	12,834
Accrued professional services	19,116	16,605
Sales and Excise Tax Payable, Current	16,834	13,565
Other accrued expenses	49,863	64,872
Accrued expenses	$ 316,983	$ 335,605