Commitments and Contingencies Warranty Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Total warranty expense	$ 950	$ 2,428	$ 4,242	$ 8,321