Commitments and Contingencies - Warranty Account Accrual Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Movement in Product Warranty Accrual [Roll Forward]
Beginning balance	$ 53,241	$ 60,443	$ 34,862
Assumed liabilities from acquisition	0	0	12,946
New product warranties	3,616	5,202	3,772
Other adjustments and expirations, net	7,736	15,695	22,741
Claims activity	(25,582)	(27,916)	(12,753)
Effect of change in exchange rates	2,379	(183)	(1,125)
Ending balance	41,390	53,241	60,443
Less: current portion of warranty	28,329	38,509	47,205
Long-term warranty	13,061	14,732	13,238
Total warranty expense	$ 11,539	$ 17,975	$ 26,513