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Long-lived Tangible Assets
 9 Months Ended
Sep. 30, 2022
Segment Reporting [Abstract]  
Long-lived Tangible Assets Long-lived Tangible Assets
Long-lived tangible assets by geographic area, which include property, plant, and equipment, net and operating lease right-of-use assets, were as follows:
(In thousands)September 30, 2022December 31, 2021
United States$16,514 $16,804 
People's Republic of China43,769 52,851 
Mexico17,869 20,509 
All other countries6,076 4,330 
Total long-lived tangible assets$84,228 $94,494 

Property, plant, and equipment are shown net of accumulated depreciation of $165.8 million and $165.9 million at September 30, 2022 and December 31, 2021, respectively.

Depreciation expense was $4.9 million and $5.6 million for the three months ended September 30, 2022 and 2021, respectively. Depreciation expense was $15.1 million and $17.1 million for the nine months ended September 30, 2022 and 2021, respectively.