Warranty Warranty Expense (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Other Income and Expenses [Abstract]
Standard and Extended Product Warranty Accrual	$ 45,204	$ 42,745	$ 40,467	$ 39,847
Standard and Extended Product Warranty Accrual, Increase for Warranties Issued	13,050	9,788
Standard and Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties	(3,243)	(1,219)
Standard and Extended Warranty Accrual, increase from Business Acquisitions	1,060	0
Standard and Extended Product Warranty Accrual, Period Increase (Decrease)	(7,437)	(5,707)
Standard and Extended Product Warranty Accrual, Foreign Currency Translation Gain (Loss)	$ 1,307	$ 36