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Segment Information - Summary of Company's Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Net sales
Net sales	$ 114,842		$ 108,915		$ 211,995	$ 207,054
Income taxes
Income taxes	2,984		2,489		3,088	4,590
Net income
Net income	7,904	$ 1,824	6,735	$ 5,528	9,728	12,263
Assets
Identifiable assets	425,153				425,153		$ 358,797
PLP-USA [Member]
Net sales
Net sales	46,369		42,665		87,794	82,107
Income taxes
Income taxes	1,766		854		1,252	1,228
Net income
Net income	4,278		1,843		4,197	3,556
Assets
Identifiable assets	127,315				127,315		118,171
The Americas [Member]
Net sales
Net sales	17,708		18,008		31,479	37,555
Income taxes
Income taxes	870		979		1,046	2,368
Net income
Net income	1,659		2,657		2,623	5,800
Assets
Identifiable assets	79,423				79,423		69,764
EMEA [Member]
Net sales
Net sales	22,610		21,402		38,244	36,483
Income taxes
Income taxes	3		421		78	659
Net income
Net income	805		1,561		1,317	1,925
Assets
Identifiable assets	94,884				94,884		57,263
Asia-Pacific [Member]
Net sales
Net sales	28,155		26,840		54,478	50,909
Income taxes
Income taxes	345		235		712	335
Net income
Net income	1,162		674		1,591	982
Assets
Identifiable assets	123,531				123,531		$ 113,599
Intersegment Eliminations [Member]
Net sales
Net sales	(8,050)		(8,934)		(15,875)	(15,128)
Intersegment Eliminations [Member] | PLP-USA [Member]
Net sales
Net sales	(2,166)		(2,252)		(4,429)	(4,434)
Intersegment Eliminations [Member] | The Americas [Member]
Net sales
Net sales	(1,626)		(2,614)		(3,756)	(4,582)
Intersegment Eliminations [Member] | EMEA [Member]
Net sales
Net sales	(326)		(506)		(563)	(840)
Intersegment Eliminations [Member] | Asia-Pacific [Member]
Net sales
Net sales	$ (3,932)		$ (3,562)		$ (7,127)	$ (5,272)

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