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Revenue and Accounts Receivable, Net
 3 Months Ended
Mar. 31, 2022
Receivables [Abstract]  
Revenue and Accounts Receivable, Net Revenue and Accounts Receivable, Net
Revenue Details

The pattern of revenue recognition was as follows:
Three Months Ended March 31,
(In thousands)20222021
Goods and services transferred at a point in time$109,086 $122,888 
Goods and services transferred over time23,32427,654
Net sales$132,410 $150,542 

Our net sales to external customers by geographic area were as follows:
Three Months Ended March 31,
(In thousands)20222021
United States$43,827 $50,292 
Asia (excluding PRC)33,06434,216 
Europe22,66027,527
People's Republic of China19,29224,340
Latin America6,4886,144
Other7,0798,023
Total net sales$132,410 $150,542 

Specific identification of the customer billing location was the basis used for attributing revenues from external customers to geographic areas.

Net sales to the following customers totaled more than 10% of our net sales:
 Three Months Ended March 31,
20222021
 $ (thousands)% of Net Sales$ (thousands)% of Net Sales
Comcast Corporation$19,884 15.0 %$27,201 18.1 %
Daikin Industries Ltd. $17,141 12.9 %$17,437 11.6 %

Accounts Receivable, Net

Accounts receivable, net were as follows:
(In thousands)March 31, 2022December 31, 2021
Trade receivables, gross$126,807 $122,508 
Allowance for credit losses(1,063)(1,285)
Allowance for sales returns(531)(592)
Trade receivables, net125,213 120,631 
Other (1)
7,415 8,584 
Accounts receivable, net$132,628 $129,215 
(1)Other accounts receivable is primarily comprised of value added tax and supplier rebate receivables.
Allowance for Credit Losses

Changes in the allowance for credit losses were as follows:
(In thousands)Three Months Ended March 31,
20222021
Balance at beginning of period$1,285 $1,412 
Additions (reductions) to costs and expenses(204)2 
Write-offs/Foreign exchange effects(18)(56)
Balance at end of period$1,063 $1,358 

Trade receivables associated with this significant customer that totaled more than 10% of our accounts receivable, net were as follows:
March 31, 2022December 31, 2021
$ (thousands)% of Accounts Receivable, Net$ (thousands)% of Accounts Receivable, Net
Comcast Corporation$20,035 15.1 %$— 
(1)
— %
(1)

(1) Trade receivables associated with this customer did not total more than 10% of our accounts receivable, net for the indicated period.