Revenue and Accounts Receivable, Net - Net Sales to Significant Customers (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Net sales	$ 150,491	$ 153,133	$ 301,033	$ 304,911
Comcast Corporation
Disaggregation of Revenue [Line Items]
Net sales	$ 24,699	$ 29,546	$ 51,900	$ 62,481
Comcast Corporation \| Customer concentration risk \| Net sales
Disaggregation of Revenue [Line Items]
Concentration risk percentage	16.40%	19.30%	17.20%	20.50%
Daikin Industries Ltd.
Disaggregation of Revenue [Line Items]
Net sales	$ 16,448	$ 16,457	$ 33,885	$ 0
Daikin Industries Ltd. \| Customer concentration risk \| Net sales
Disaggregation of Revenue [Line Items]
Concentration risk percentage	10.90%	10.70%	11.30%	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