Revenue and Accounts Receivable, Net - Net Sales to Significant Customers (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 150,542	$ 151,778
Comcast Corporation
Disaggregation of Revenue [Line Items]
Net sales	$ 27,201	$ 32,935
Comcast Corporation \| Customer concentration risk \| Net sales
Disaggregation of Revenue [Line Items]
Concentration risk percentage	18.10%	21.70%
Daikin Industries Ltd.
Disaggregation of Revenue [Line Items]
Net sales	$ 17,437	$ 0
Daikin Industries Ltd. \| Customer concentration risk \| Net sales
Disaggregation of Revenue [Line Items]
Concentration risk percentage	11.60%	0.00%

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details