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Revenue - Revenues by Segment and Product Type (Detail)
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 100.00% 100.00% 100.00% 100.00%
Energy [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 60.00% 68.00% 61.00% 67.00%
Communications [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 30.00% 23.00% 30.00% 24.00%
Special Industries [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 10.00% 9.00% 9.00% 9.00%
PLP-USA [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 100.00% 100.00% 100.00% 100.00%
PLP-USA [Member] | Energy [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 61.00% 65.00% 59.00% 64.00%
PLP-USA [Member] | Communications [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 35.00% 30.00% 36.00% 30.00%
PLP-USA [Member] | Special Industries [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 4.00% 5.00% 5.00% 6.00%
The Americas [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 100.00% 100.00% 100.00% 100.00%
The Americas [Member] | Energy [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 65.00% 78.00% 70.00% 76.00%
The Americas [Member] | Communications [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 31.00% 18.00% 26.00% 18.00%
The Americas [Member] | Special Industries [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 4.00% 4.00% 4.00% 6.00%
EMEA [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 100.00% 100.00% 100.00% 100.00%
EMEA [Member] | Energy [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 51.00% 60.00% 55.00% 57.00%
EMEA [Member] | Communications [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 44.00% 33.00% 39.00% 35.00%
EMEA [Member] | Special Industries [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 5.00% 7.00% 6.00% 8.00%
Asia-Pacific [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 100.00% 100.00% 100.00% 100.00%
Asia-Pacific [Member] | Energy [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 65.00% 74.00% 67.00% 74.00%
Asia-Pacific [Member] | Communications [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 3.00% 4.00% 5.00% 4.00%
Asia-Pacific [Member] | Special Industries [Member]        
Disaggregation Of Revenue [Line Items]        
Percentage of disaggregated revenue 32.00% 22.00% 28.00% 22.00%