Revenue - Revenues by Segment and Product Type (Detail)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%
Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	63.00%	66.00%
Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	29.00%	24.00%
Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	8.00%	10.00%
PLP-USA [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%
PLP-USA [Member] | Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	57.00%	64.00%
PLP-USA [Member] | Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	38.00%	30.00%
PLP-USA [Member] | Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	5.00%	6.00%
The Americas [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%
The Americas [Member] | Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	74.00%	71.00%
The Americas [Member] | Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	22.00%	22.00%
The Americas [Member] | Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	4.00%	7.00%
EMEA [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%
EMEA [Member] | Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	60.00%	62.00%
EMEA [Member] | Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	33.00%	30.00%
EMEA [Member] | Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	7.00%	8.00%
Asia-Pacific [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	100.00%	100.00%
Asia-Pacific [Member] | Energy [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	72.00%	74.00%
Asia-Pacific [Member] | Communications [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	5.00%	4.00%
Asia-Pacific [Member] | Special Industries [Member]
Disaggregation Of Revenue [Line Items]
Percentage of disaggregated revenue	23.00%	22.00%